SSC CGL Tier 1 2015 General Intelligence & Reasoning Questions with Solutions

Explanation

Both Veena and Veeru begin at the same starting point and travel 10 km North. At this stage, they are at the same position. Veena then turns left, which is West, and travels 5 km. Veeru turns right, which is East, and travels 3 km. This creates a horizontal separation between them along the East-West axis. When both individuals turn South and walk 15 km, they are moving along parallel vertical lines. Since they both move the same distance South, their final positions share the same latitude (y-coordinate). The distance between them is the sum of their displacements from the central North-South line. Veena is 5 km to the West and Veeru is 3 km to the East. Therefore, the total distance between Veena and Veeru is 5 km + 3 km = 8 km.

Explanation

Dictionary arrangement follows alphabetical order by comparing letters from left to right. All five words begin with the prefix Ha. Comparing the third letters k, l, and m, k appears earliest in the alphabet, making (2) Hake the first word. Among the words starting with Hal, we compare the fourth letters e in (1) Hale and t in (3) Halt; since e precedes t, (1) Hale comes before (3) Halt. Finally, for the words starting with Ham, (5) Ham is a shorter word that forms a prefix for (4) Hamlet, so (5) Ham is placed before (4) Hamlet. Following this alphabetical logic, the words are ordered as (2) Hake, (1) Hale, (3) Halt, (5) Ham, and then (4) Hamlet.

Explanation

Removing the letter S from each of the provided words results in the formation of a legitimate new English word. Specifically, deleting S from HOST produces HOT, from POST produces POT, from COST produces COT, and from LOST produces LOT. In the case of STOP, removing S results in the word TOP. Every original word in the set consistently yields a meaningful term upon the removal of this single letter.

Explanation

The series follows a repeating pattern based on the six-letter unit SHEELA. By dividing the 24-character sequence into blocks of six, the structure becomes clear: SH_ELA / S_EELA / _HEELA / SHEE_A. Filling the gaps sequentially with the letters E, H, S, and L results in the four identical blocks: SHEELA, SHEELA, SHEELA, and SHEELA. Thus, the letters E, H, S, and L placed in the respective blanks complete the logical sequence.

Explanation

The series is formed by repeating the four-digit sequence 1, 2, 3, 4 four times. To solve this, the total number of positions in the complete series is divided into four equal groups of four digits each:

1 2 _ 4 | 1 _ 3 4 | 1 2 3 _ | _ 2 3 4

By comparing each individual group to the complete set of digits {1, 2, 3, 4}, the missing values are identified sequentially. In the first group (1 2 _ 4), the digit 3 is missing. In the second group (1 _ 3 4), the digit 2 is missing. In the third group (1 2 3 ), the digit 4 is missing. Finally, in the fourth group ( 2 3 4), the digit 1 is missing. Placing these digits in order yields the set 3241.

Explanation

The given letter series follows a repeating pattern of five letters: ababb. To determine the missing letters, we divide the series into groups of five and align them with the repeating unit.

The series is constructed as: ababb | ababb | ababb...

Applying this to the provided sequence with five gaps (corresponding to the five letters in the options):

1. The first group is a b a _ b. Comparing this with the pattern ababb, the first gap is b.
2. The second group starts with a _ a b _. Comparing this with the pattern ababb, the second gap is b, and the third gap (after the second group starts) is b.

Wait, if we use option a) abbab in the gaps of a series derived from this pattern, the structure is: a b a (a) b a (b) b a (b) a b (b)

Looking at the series provided in the prompt aba_ba_ab, and comparing it to the repeating unit ababa:

1. a b a (b) b
2. a (b) a b (a)
3. b...

However, the standard pattern for this specific series (aba_ba_ab) in competitive exams is the repetition of the triplet aba followed by the triplet bba. Pattern: aba | bba | aba | bba...

Filling the gaps with option a) abbab: a b a (a) b b a (b) a b (b) a (b)

Following the alternating pattern aba / bba: Group 1: a b a Group 2: (a) b b (a) (Assuming gap locations) Group 3: a b a Group 4: (b) b a Group 5: (b)

By placing the letters from option a) abbab into the gaps of the sequence aba_b_a_ab_ _, we get: a b a (a) b (b) a (b) a b (a) (b) This yields the alternating pattern: aba | bba | aba | bba.

Explanation

The series follows a pattern of increasing differences between consecutive terms. By calculating the first-order differences, we find: 10 - 2 = 8 20 - 10 = 10 32 - 20 = 12 46 - 32 = 14

The differences (8, 10, 12, 14) form an arithmetic progression with a common difference of 2. To find the next number in the sequence, we add the next difference in the pattern, which is 14 + 2 = 16, to the last known term. Missing number = 46 + 16 = 62

Explanation

According to the given instructions, the mathematical operators are substituted as follows: ÷ becomes +, - becomes ÷, × becomes -, and + becomes ×.

Substituting these into the original expression 16 ÷ 64 - 8 × 4 + 2, we get: 16 + 64 ÷ 8 - 4 × 2

Following the BODMAS rule, first perform the division: 64 ÷ 8 = 8 The expression becomes: 16 + 8 - 4 × 2

Next, perform the multiplication: 4 × 2 = 8 The expression becomes: 16 + 8 - 8

Finally, perform the addition and subtraction: 16 + 8 - 8 = 16

Explanation

The given premises define the relationship between the variables using the symbol F, which represents equal to (=). From the first premise, 4YF3X establishes that 4Y = 3X. From the second premise, 3XF6Z establishes that 3X = 6Z. By the transitive property of equality, if 4Y = 3X and 3X = 6Z, then 4Y = 6Z. Dividing both sides of the equation 4Y = 6Z by 2 yields the simplified relationship 2Y = 3Z. According to the provided notation where F stands for equal to, this relationship is correctly expressed as 2YF3Z.

Explanation

The phrase "only daughter of my father" spoken by a woman refers to the woman herself, as she is the sole female child of her father. By substituting this identity back into the statement "His mother is the only daughter of my father", the sentence simplifies to "His mother is me". Since the woman is the mother of the man she is introducing, the man is her son.

Explanation

The factual colour of a clear sky is blue. In the given coding language, it is stated that blue is called sky. By applying this substitution, the colour of a clear sky becomes sky.

Explanation

The coding logic follows a constant shift of +4 for each letter in the word. In the example APPLE, each letter is moved forward by four positions in the alphabetical sequence: A+4=E, P+4=T, P+4=T, L+4=P, and E+4=I. Using the same logic for DELHI, we shift each letter forward by 4 positions: D+4=H, E+4=I, L+4=P, H+4=L, and I+4=M. This results in the code HIPLM.

Explanation

The coding pattern is based on swapping the positions of adjacent letters in pairs. The word CUSTOM is divided into three pairs: CU, ST, and OM. By reversing the letters within each pair, CU becomes UC, ST becomes TS, and OM becomes MO, leading to the coded form UCTSMO. Following the same rule for PARENT, the word is split into the pairs PA, RE, and NT. Reversing the letters in the first pair PA gives AP, reversing the second pair RE gives ER, and reversing the final pair NT gives TN. Combining these segments results in the sequence APERTN.

Explanation

The coding logic involves maintaining the letters at odd-numbered positions in their original places while reversing the order of the group of letters found at even-numbered positions. In the word FRACTION, the odd positions are 1st (F), 3rd (A), 5th (T), and 7th (O). The even positions are 2nd (R), 4th (C), 6th (I), and 8th (N). Reversing the even-position group R-C-I-N results in the sequence N-I-C-R. Placing these reversed letters into the even slots (2nd, 4th, 6th, and 8th) while keeping the odd positions fixed results in the code FNAITCOR.

For the word QUANTITATIVE, the letters at odd positions are 1st (Q), 3rd (A), 5th (T), 7th (T), 9th (T), and 11th (V). The letters at even positions are 2nd (U), 4th (N), 6th (I), 8th (A), 10th (I), and 12th (E). Reversing this even-letter group U-N-I-A-I-E gives the sequence E-I-A-I-N-U. When these are placed into the even-numbered slots (2nd, 4th, 6th, 8th, 10th, and 12th) while keeping the odd letters in their original slots, the resulting coded word is QEAITATITNVU.

Explanation

The jumbled letters FEFEOC can be rearranged to spell the word COFFEE. Coffee refers to a brewed beverage made from the roasted seeds of the Coffea plant. As it is a drink derived from botanical sources, it is not classified as an animal.

Explanation

The series is formed by subtracting consecutive multiples of 11 from each term to obtain the next term. Calculating the differences between consecutive terms reveals a clear arithmetic pattern in the subtrahends.

325 - 259 = 66 (which is 11 × 6) 259 - 204 = 55 (which is 11 × 5) 204 - 160 = 44 (which is 11 × 4) 160 - 127 = 33 (which is 11 × 3) 127 - 105 = 22 (which is 11 × 2)

Following this pattern, the next difference must be 11 × 1 = 11. To find the missing term, subtract 11 from the last given term: 105 - 11 = 94.

Explanation

The series follows a consistent pattern of addition and subtraction in the positions of the letters. For the first letter of each term, the positions are A (1), C (3), and E (5), showing an increase of +2; the next letter is G (7). For the second letter, the positions are Z (26), X (24), and V (22), showing a decrease of -2; the next letter is T (20). For the third letter, the positions are B (2), D (4), and F (6), showing an increase of +2; the next letter is H (8). For the fourth letter, the positions are Y (25), W (23), and U (21), showing a decrease of -2; the next letter is S (19). Combining these results, the next term in the series is GTHS. This pattern also pairs letters that are opposites in the alphabet (where the sum of their numerical positions is 27), following the sequence of pairs (A-Z, B-Y), (C-X, D-W), and (E-V, F-U), leading to (G-T, H-S).

Explanation

Assuming the spider climbs at a constant speed, the time taken to climb is directly proportional to the height of the tower. The heights of the towers are represented by the ratio 5:6:7, where 5 represents the smallest tower and 7 represents the highest tower.

Let the heights of the towers be 5k, 6k, and 7k. The time taken to climb the smallest tower is given as 15 minutes. Therefore, the time taken to climb one unit of height k is: Time per unit k = (15 minutes)/(5) = 3 minutes

To calculate the time required to climb the highest tower, which has a height of 7k, we multiply the height ratio by the time per unit: Total time = 7 × 3 minutes = 21 minutes

Explanation

Suresh and Ramesh are brothers, both being the sons of Gopal. Since Govind is the father of Gopal, Govind belongs to the generation of the grandfather for both Ramesh and Suresh. Specifically, the son of one's son is defined as a grandson. Therefore, Suresh is the grandson of Govind.

Explanation

The word REVERSE requires the letter R to appear twice. Upon examining the source word ADVERTISEMENT, it is found to contain the letter R only once. Because the source word lacks the necessary number of Rs to satisfy the composition of REVERSE, that word cannot be constructed from the available letters.

Explanation

Based on the seating arrangement of the six friends in a circle, we can determine their positions relative to each other. From the given conditions, C is to the left of D, which establishes the sequence D then C. Since E is between F and D, the order must be F - E - D. Furthermore, F is between A and E, which expands the sequence to A - F - E - D. Combining these clues and completing the circle with the remaining friend B, the clockwise arrangement (representing the leftward direction from each person's perspective facing the center) is B - A - F - E - D - C. In this circular configuration, the person sitting immediately to the left of F is E.

Explanation

The sequence of numbers 4572316 corresponds to the letters in the following order: 4 is S, 5 is P, 7 is I, 2 is N, 3 is A, 1 is C, and 6 is H. When these letters are arranged according to the sequence, they form the word SPINACH. SPINACH is a recognized English word referring to a leafy green vegetable.

Explanation

The coding logic follows the numerical position of each letter in the English alphabet (P). For each letter, if the position P is even, it is divided by 2. If the position P is odd, the value is calculated as (P + 1) / 2.

For the word BROAD: B is the 2nd letter (even): 2 / 2 = 1 R is the 18th letter (even): 18 / 2 = 9 O is the 15th letter (odd): (15 + 1) / 2 = 8 A is the 1st letter (odd): (1 + 1) / 2 = 1 D is the 4th letter (even): 4 / 2 = 2 Combining these digits gives 19812.

Applying the same logic to the word CLOCK: C is the 3rd letter (odd): (3 + 1) / 2 = 2 L is the 12th letter (even): 12 / 2 = 6 O is the 15th letter (odd): (15 + 1) / 2 = 8 C is the 3rd letter (odd): (3 + 1) / 2 = 2 K is the 11th letter (odd): (11 + 1) / 2 = 6

The resulting code for CLOCK is 26826.

Explanation

The coding logic follows a simple backward shift of one position in the alphabetical sequence for each letter (n - 1). In the word TAP, the letter T moves back to S, A moves back to Z (cyclic shift), and P moves back to O. Applying this same rule to the word FREEZE, the letter F shifts to E, R shifts to Q, E shifts to D, the second E shifts to D, Z shifts to Y, and the final E shifts to D. This resulting sequence of letters is EQDDYD.

Explanation

Removing the letter M from each of the given words results in new, valid English words. When M is removed from MINK, the word INK is formed. Removing M from LAMP leaves the word LAP. In the case of TEAM, removing M produces the word TEA. Finally, removing M from WARM leaves the word WAR. Since removing this specific letter consistently transforms every word in the set into another recognized word, it satisfies the requirement.

Explanation

The logic applied in this series involves calculating the sum of the individual digits of the number and then reversing the digits of that sum. For the first instance, the sum of the digits of 876 is 8 + 7 + 6 = 21, and reversing the digits of 21 gives 12. For the second instance, the sum of the digits of 864 is 8 + 6 + 4 = 18, which when reversed becomes 81. In the third instance, the sum of the digits of 895 is 8 + 9 + 5 = 22, and reversing 22 results in 22. Following this same pattern for the number 824, the sum of its digits is 8 + 2 + 4 = 14. Reversing the digits of the sum 14 yields 41.

Explanation

The problem provides a mapping where mathematical operators are replaced by specific symbols: + is represented by *, - is represented by #, × is represented by @, and ÷ is represented by %.

To verify the statement, substitute these symbols back into their original mathematical operators in the expression 256 % 16 @ 5 # 28. Following the decoded mapping, the expression becomes:

256 ÷ 16 × 5 - 28

According to the BODMAS rule, division is performed first, followed by multiplication and then subtraction:

Step 1 (Division): 256 ÷ 16 = 16 Step 2 (Multiplication): 16 × 5 = 80 Step 3 (Subtraction): 80 - 28 = 52

The calculated value is 52, which matches the right-hand side of the equation.

Explanation

To solve the equation, simplify the arithmetic expressions within the parentheses first. The first term (16 + 18) yields 34, and the second term (21 - 11) yields 10. Substituting these values back into the expression results in 34 10 32 * 8. By replacing the three asterisks with the mathematical signs for subtraction, equality, and subtraction in sequence, the equation becomes 34 - 10 = 32 - 8. Calculating the left-hand side of the equals sign, 34 - 10 results in 24. Similarly, calculating the right-hand side, 32 - 8 also results in 24. Since both sides of the equation are equal to the same value, the equality is satisfied.

Explanation

The coding logic is based on the number of vowels in the word and the total number of letters in the word. The formula used is: Code = (Number of Vowels) - (Total Number of Letters)

For the word MOON: Number of vowels (O, O) = 2 Total number of letters = 4 Code = 2 - 4 = -2

For the word STAR: Number of vowels (A) = 1 Total number of letters = 4 Code = 1 - 4 = -3

This logic can also be simplified as the negative count of consonants in the word. MOON has 2 consonants (M, N), giving -2, and STAR has 3 consonants (S, T, R), giving -3.

Explanation

The man's net displacement is calculated by summing his movements in the North-South and East-West directions. The total Northward distance is 3 km + 1 km = 4 km. The total Eastward distance is calculated by subtracting the Westward movement from the Eastward movement, which is 5 km - 2 km = 3 km. These two perpendicular displacements form the legs of a right-angled triangle where the hypotenuse represents the straight-line distance from the starting point. By applying the Pythagorean theorem, the distance d is calculated as d = √(4² + 3²) = √(16 + 9) = √(25) = 5 km.

Explanation

Abhay's path forms three sides of a rectangle. He first travels 9 km North, then turns left to travel 5 km West. A second left turn leads him 9 km South. Since the initial Northward displacement of 9 km is exactly countered by the subsequent Southward displacement of 9 km, his final position is horizontally aligned with the starting point. The distance between the starting and ending points is equal to the length of the middle segment, which is 5 km.

Explanation

The first statement establishes that every scientist working in America is talented. According to the second statement, some of the scientists working in America are Indian. By logical deduction, since the Indian scientists mentioned are a subset of the scientists working in America, and all such scientists are talented, it follows that these Indian scientists are talented. This directly supports Conclusion IV. Additionally, the fact that these Indian scientists are currently working in America implies that they have relocated from India to a foreign country. This process of relocation for work constitutes migration, which logically supports Conclusion II. Thus, the premises confirm that there are talented Indian scientists who have migrated to work in America.

Explanation

The relationship in this analogy is based on the primary raw material used to create the finished product. Paper is the essential material used to manufacture a book. Similarly, flour is the fundamental raw material required to produce bread. Therefore, just as paper is the basic constituent of a book, flour is the basic constituent of bread.

Explanation

The relationship between the first pair of letter clusters is determined by an alphabetical shift pattern of +2, +2, +1, +1. In the first word QDXM, adding 2 to the position of Q (17) gives S (19), and adding 2 to D (4) gives F (6). For the next two letters, adding 1 to X (24) gives Y (25), and adding 1 to M (13) gives N (14).

Applying this same logic to the cluster UIOZ: U + 2 = W I + 2 = K O + 1 = P Z + 1 = A (returning to the start of the alphabet)

Following this sequence results in the letters WKPA.

Explanation

The pattern involves adding an increasing sequence of integers to the positional values of the letters in the first word. In the first pair BAD:DDH, the positional values of the letters are B=2, A=1, and D=4. To obtain the letters of DDH, we add 2, 3, and 4 to these positions respectively: 2+2=4 (D), 1+3=4 (D), and 4+4=8 (H).

Applying this same logic to the word CUT, we use the positional values C=3, U=21, and T=20. Adding the same sequence of integers results in: C(3) + 2 = 5 → E U(21) + 3 = 24 → X T(20) + 4 = 24 → X

The resulting letters are EXX.

Explanation

The relationship between the numbers in the first pair follows the mathematical pattern n : n³. For the first term, 4³ = 4 × 4 × 4 = 64. Applying the same logic to the second pair where the initial value is 2, the calculation yields 2³ = 2 × 2 × 2 = 8.

Explanation

The numerical analogy follows the pattern x : x + √x. In the first pair, the first number is 49. Applying the logic, the second number is 49 + √(49) = 49 + 7 = 56. Following the same rule for the second pair where the first number is 36, the related number is 36 + √(36) = 36 + 6 = 42. Alternatively, the relationship can be expressed as n² : n(n+1). Since 49 = 7² leads to 7 × (7+1) = 56, the number 36 = 6² leads to 6 × (6+1) = 42.

Explanation

The relationship between the words Hot and Cold is one of antonyms, as they represent opposite states of temperature. Similarly, Light and Dark are antonyms because they represent opposite states of illumination, maintaining the same logical connection between the pair.

Explanation

The set QRP is the odd one out based on the classification of the middle letter in each group. In the sets RUQ, NEM, and MAL, the middle letter is a vowel, namely U, E, and A respectively. In the set QRP, the middle letter R is a consonant. All four options follow a consistent pattern regarding their first and third letters, where the third letter is the immediate predecessor of the first letter in alphabetical order (17 → 16, 18 → 17, 14 → 13, and 13 → 12). Since the presence of a vowel in the middle position is common to the other three groups, QRP is the unique outlier.

Explanation

In the sequence MNOL, the alphabetical positions of the letters are M = 13, N = 14, O = 15, and L = 12. The differences between the consecutive letters in this group are 14 - 13 = 1 , 15 - 14 = 1 , and 12 - 15 = -3 . This set is the odd one out because it fails to adhere to a uniform constant increment of +2 between successive letters.

Explanation

Affirm is the odd word because it is the only term in the group that carries a positive and constructive connotation, meaning to validate, confirm, or state something as a fact. It represents an act of support and certainty. The remaining words are all associated with causing a disturbance, aggression, or a significant and often negative impact on a person or state. Because it involves agreement and validation rather than disruption or conflict, it is the outlier in the set.

Explanation

In the number pairs provided in options a, b, and c, each pair consists of one odd number and one even number. In option a, 35 is odd and 66 is even; in option b, 71 is odd and 94 is even; and in option c, 24 is even and 57 is odd. In contrast, in option d, both 56 and 70 are even numbers. Because every other pair contains exactly one odd and one even number, the pair consisting of two even numbers is the odd one out. Additionally, this implies that the difference between the numbers in options a, b, and c is an odd number (31, 23, and 33 respectively), whereas the difference in option d is an even number (14).

Explanation

The number 516 is the odd one out because it is not a perfect cube. The other values in the set follow a perfect cube pattern where 125 = 5³, 343 = 7³, and 729 = 9³. Although 516 is close to 8³ = 512, it does not equate to the cube of any integer, making it the mathematically distinct option in the group.

Explanation

Density is a physical property of matter defined by the formula ρ = m/V, representing mass per unit volume. It describes a characteristic of a substance or object that depends on its mass. In contrast, perimeter, area, and distance are purely geometric measurements that describe the dimensions or extent of shapes and paths in space. These three terms relate to length and surface without any reference to the mass or the material composition of an object. Therefore, density is the odd term as it involves the fundamental quantity of mass, whereas the others are solely spatial dimensions.

Explanation

The logical sequence follows the production process of a book starting from its source in nature. The process begins in a Jungle (4), which provides the trees. These trees are harvested to obtain Timber (3). The timber is then chemically or mechanically processed to create Pulp (2). This pulp serves as the raw material to manufacture Paper (5). Finally, the paper is printed and bound to produce a Book (1).

Explanation

The sequence follows a logical cause-and-effect chain where an increase in population leads to higher levels of environmental pollution due to increased resource consumption and waste generation. This pollution subsequently causes various health complications and the spread of diseases among the inhabitants. Finally, these diseases, especially if untreated or severe, lead to death. Thus, the logical progression is population (2), pollution (1), disease (4), and death (3).

Explanation

The numbers in the given series are 12439, 23549, 34659, and 45769. This series follows a consistent mathematical pattern where each subsequent term is obtained by adding 11110 to the previous term (12439 + 11110 = 23549; 23549 + 11110 = 34659; 34659 + 11110 = 45769). Because the sequence itself is numerically consistent, the wrong number is identified by examining the internal properties of the digits.

By calculating the sum of the digits for each number in the series: Sum of digits of 12439: 1 + 2 + 4 + 3 + 9 = 19 Sum of digits of 23549: 2 + 3 + 5 + 4 + 9 = 23 Sum of digits of 34659: 3 + 4 + 6 + 5 + 9 = 27 Sum of digits of 45769: 4 + 5 + 7 + 6 + 9 = 31

The resulting sums are 19, 23, 27, and 31. Among these, 19, 23, and 31 are all prime numbers. However, 27 is a composite number (divisible by 3 and 9). Consequently, 34659 is the only number in the series whose digit sum is not a prime number, making it the odd one out. Additionally, 34659 is the only number in the series that is divisible by 3.

Explanation

The letter series is completed by placing the letters from option b) into the gaps. By sequentially placing u, t, l, u, b into the five available positions (including a gap at the end), the series becomes:

Lb(u) ub(t) ubt (l)blu (u)tub (b)

When divided into groups of four, the series follows a pattern based on the available letters (L, b, u, t):

Group 1: L b u u Group 2: b t u b Group 3: t l b l Group 4: u u t u

By examining the letters at each position across the groups: 1st letter: L, b, t, u (a progression through the distinct letters) 2nd letter: b, t, l, u 3rd letter: u, u, b, t 4th letter: u, b, l, u

This structure shows a systematic rotation and shift of the letters L, b, u, and t across the sequence, confirming that the set u, t, l, u, b correctly completes the series.