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

Explanation

In the letter group DKRY, the alphabetical positions of the letters are D = 4, K = 11, R = 18, and Y = 25. There is a uniform difference of +7 between each consecutive letter in the sequence. This constant step size of +7 makes this group the unique patterned alternative.

Explanation

The letter cluster UXeN contains two vowels, which are U and e. In contrast, all the other letter clusters contain only a single vowel. Specifically, FoMY has only o, DKUZ has only U, and LPuB has only u.

Explanation

The given series follows a simple alphabetical progression where each consecutive term is obtained by shifting the letters of the previous term by plus 1 position in the English alphabet.

For the first letter of each term, the sequence is O → P → Q → R, which leads to S.

For the second letter of each term, the sequence is T → U → V → W, which leads to X.

For the third letter of each term, the sequence is E → F → G → H, which leads to I.

Combining these individual letter progressions yields SXI.

Explanation

The series follows a pattern where consecutive perfect squares are paired with the number obtained by reversing their digits.

The first term is 4² = 16, and the second term is its digits reversed, which is 61. The third term is 5² = 25, and the fourth term is its digits reversed, which is 52. The fifth term is 6² = 36, and the sixth term is its digits reversed, which is 63. The seventh term is 7² = 49, and following the same pattern, the eighth term is obtained by reversing the digits of 49, which gives 94.

Explanation

The series is formed by adding consecutive multiples of 11 to each subsequent term.

18 - 7 = 11 (11 × 1) 40 - 18 = 22 (11 × 2) 73 - 40 = 33 (11 × 3) 117 - 73 = 44 (11 × 4)

Following this pattern, the difference between the fifth term and the missing term must be the next multiple of 11, which is 55 (11 × 5).

117 + 55 = 172

Explanation

The series is formed by increasing each letter in the term by 1 position in the alphabetical order.

Looking at the first letter of each term: A to B (+1), B to C (+1), so the next letter is D. Looking at the second letter: F to G (+1), G to H (+1), so the next letter is I. Looking at the third letter: K to L (+1), L to M (+1), so the next letter is N. Looking at the fourth letter: P to Q (+1), Q to R (+1), so the next letter is S. Looking at the fifth letter: U to V (+1), V to W (+1), so the next letter is X.

Combining these letters in sequence yields DINSX.

Explanation

The series is formed by adding consecutive even numbers to each preceding term. The differences between successive terms are 2, 4, 6, 8, 10, 12, and 14: 3 + 2 = 5 5 + 4 = 9 9 + 6 = 15 15 + 8 = 23 23 + 10 = 33 33 + 12 = 45 45 + 14 = 59

Following this logic, the next term is obtained by adding the next consecutive even number, which is 16, to the previous term: 59 + 16 = 75

Explanation

Applying the specified interchanges in signs (+ and ÷) and numbers (6 and 5) to the equation in option B:

The original expression is: 18 + 6 ÷ 5 = 9.6

After interchanging + with ÷ and 6 with 5, the expression becomes: 18 ÷ 5 + 6

Now, solving the expression using the BODMAS rule: First, perform the division: 18 ÷ 5 = 3.6

Next, perform the addition: 3.6 + 6 = 9.6

The left-hand side matches the right-hand side of 9.6, making the equation true.

Explanation

The word SEEMS requires the letter E to appear twice. In the given word METAPHYSICS, the letter E is present only once. This makes it impossible to form the word SEEMS.

Explanation

The word RAILWAYSTATION contains only one letter S. The word OSTITIS requires two S letters, which makes it impossible to form using the letters of RAILWAYSTATION.

Explanation

In each column of the matrix, the number in the second row is the difference between the number in the first row and the number in the third row.

Row 1 - Row 3 = Row 2

For the first column: 65 - 44 = 21

For the third column: 87 - 66 = 21

Applying this same relationship to the second column: 77 - 55 = 22

Explanation

When the letter group a b a b is sequentially placed in the four gaps of the series, we get:

First gap filled with a Second gap filled with b Third gap filled with a Fourth gap filled with b

Substituting these into the given template: _ a a b b _ a _ a b _ b

The completed series becomes: a a a b b b a a a b b b

This sequence follows a repeating pattern of three a's and three b's alternating: aaa / bbb / aaa / bbb

Explanation

The pattern of the coding is adding consecutive increasing integers to each letter's positional value in alphabetical order from A = 1 to Z = 26.

For the word MISCHIEF: M + 1 = N I + 2 = K S + 3 = V C + 4 = G H + 5 = M I + 6 = O E + 7 = L F + 8 = N

Applying the same logic to the word RELIEVED: R + 1 = S E + 2 = G L + 3 = O I + 4 = M E + 5 = J V + 6 = B (since 22 + 6 = 28, which wraps around the alphabet to position 2) E + 7 = L D + 8 = L

This yields the coded sequence SGOMJBLL, which corresponds to SGOMJbLL.

Explanation

Correct Answer: D

All five words begin with the prefix Cin. To arrange them in alphabetical order, we compare their subsequent letters.

The fourth letters of the words are: Cinchona (typographed in the question as Cinohina): c Cinder: d Cinema: e Cinnabar: n Cinnamon: n

Comparing these fourth letters, c comes first, followed by d, then e, and lastly n. This establishes the initial order as 5, 2, 3.

For the remaining two words, Cinnabar and Cinnamon, both share the first five letters Cinna. Comparing their sixth letters, b in Cinnabar comes before m in Cinnamon, placing Cinnabar (1) before Cinnamon (4).

Therefore, the complete alphabetical sequence is Cinchona, Cinder, Cinema, Cinnabar, and Cinnamon, which yields the order 5, 2, 3, 1, 4.

Explanation

If two days back was Sunday, 9th November 2014, then yesterday was Monday, 10th November 2014, and today is Tuesday, 11th November 2014. Thus, tomorrow will be Wednesday, 12th November 2014.

Explanation

The chronological sequence of human technological eras, starting from the earliest, begins with the Stone Age, when early humans used stone tools. This was followed by the Metallic Age, which saw the discovery and use of naturally occurring pure metals like copper. Next came the Alloy Age, during which humans learned to combine metals to form stronger alloys, such as bronze. Finally, the modern era is represented by the Atomic Age, which began in the mid-20th century with the development of nuclear technology. In this sequence, the Alloy Age represents the third phase of development.

Explanation

The planning engineer proposes a structural solution to address the problem of heavy peak-hour traffic. Any proposal or recommendation to solve an issue is made under the assumption that the issue is undesirable and needs to be managed, controlled, or regulated. Thus, the assumption that heavy traffic should be regulated is directly implicit in the engineer's statement.

Explanation

The statement highlights that the impact of economic sanctions on an already weak economy could be devastating. By specifically qualifying the severity of the impact (devastating) based on the current state of the economy (already so weak), it is logically assumed that the impact is not uniform across all nations and depends on the strength or condition of the target country. This directly implies that the impact of economic sanctions varies from economy to economy.

Explanation

To arrange the words in alphabetical order as they appear in a dictionary, we compare their letters from left to right.

Comparing the second letters, Necessary starts with N-e, while Navigate, Nautical, and Naval all start with N-a. Since a comes before e, Necessary comes last in the sequence.

Comparing the third letters of the remaining words, Nautical has u as its third letter, whereas Navigate and Naval both have v. Since u comes before v, Nautical is placed first.

Lastly, comparing Navigate and Naval, both start with Nav. Comparing their fourth letters, Naval has a and Navigate has i. Since a comes before i, Naval precedes Navigate.

This determines the final dictionary order as Nautical (3), Naval (4), Navigate (2), and Necessary (1), which yields the sequence 3, 4, 2, 1.

Explanation

To arrange the words in alphabetical order as they appear in a dictionary, we compare them letter by letter from left to right.

Comparing the first letter, all four words begin with R.

Comparing the second letter, Rain, Range, and Ranger have the letter a, while Rein has the letter e. Since a comes before e, Rein is placed last in the sequence.

Comparing the third letter of the remaining words, Rain has the letter i, while Range and Ranger have the letter n. Since i comes before n, Rain is placed first in the sequence.

Finally, comparing Range and Ranger, the word Range is a complete subset and prefix of Ranger. A shorter word always precedes its longer extension in a dictionary, which means Range comes before Ranger.

Combining these steps, the correct alphabetical sequence of the words is Rain, Range, Ranger, Rein, which corresponds to the numerical order 2, 1, 4, 3.

Explanation

The given sequence is an arithmetic progression because the difference between any two consecutive terms is constant.

First term (a) = 9 Common difference (d) = 5 - 9 = -4

The formula for the nth term (Tₙ) of an arithmetic progression is: Tₙ = a + (n - 1) × d

To find the 20th term (n = 20) of this progression: T₂₀ = 9 + (20 - 1) × (-4) T₂₀ = 9 + 19 × (-4) T₂₀ = 9 - 76 T₂₀ = -67

Explanation

By substituting the letters from option D (m b a b m) into the blanks, the sequence becomes:

m b a m b a m b a m b a m b a

This completed sequence consists of the repeating three-letter block "m b a" repeated continuously five times:

(m b a) (m b a) (m b a) (m b a) (m b a)

This pattern perfectly completes the series.

Explanation

The operator mapping for the symbols is: stands for addition (+)

• stands for multiplication (×) ÷ stands for subtraction (-) × stands for division (÷)

Applying this mapping to the equation in option A: 5 + 2 - 12 × 6 ÷ 2 = 10

Substituting the symbols gives: 5 × 2 + 12 ÷ 6 - 2 = 10

Using the BODMAS rule: First, calculate the division: 12 ÷ 6 = 2

Next, calculate the multiplication: 5 × 2 = 10

Now substitute these back into the expression: 10 + 2 - 2 = 10 12 - 2 = 10 10 = 10

Both sides of the equation are equal.

Explanation

By substituting the given mathematical symbols into the expression, we get:

16 × 12 ÷ 6 + 5 - 4

According to the BODMAS rule, division is performed first:

12 ÷ 6 = 2

The expression then becomes:

16 × 2 + 5 - 4

Next, multiplication is performed:

32 + 5 - 4

Finally, performing addition and subtraction:

32 + 5 - 4 = 37 - 4 = 33

Explanation

The code is obtained by subtracting the alphabetical position of each letter from the number 9.

For FADE: The alphabetical positions of the letters are F = 6, A = 1, D = 4, and E = 5. Applying the pattern: 9 - 6 = 3 9 - 1 = 8 9 - 4 = 5 9 - 5 = 4 This yields the code 3854.

For GAGE: The alphabetical positions of the letters are G = 7, A = 1, G = 7, and E = 5. Applying the same pattern: 9 - 7 = 2 9 - 1 = 8 9 - 7 = 2 9 - 5 = 4 This yields the code 2824.

Explanation

The sum of the ages of three individuals (mother, daughter, and son) increases by 8 years for each person over a period of 8 years.

Future sum = Present sum + (Number of people × Years)

Substituting the given values:

Future sum = 87 + (3 × 8)

Future sum = 87 + 24

Future sum = 111

Explanation

The numerical value assigned to each word is obtained by multiplying the total number of letters in that word by 3.

For SUNDAY, there are 6 letters, so 6 × 3 = 18. For MONSOON, there are 7 letters, so 7 × 3 = 21. For YEAR, there are 4 letters, so 4 × 3 = 12.

Following this same pattern, the word THURSDAY has 8 letters, which gives 8 × 3 = 24.

Explanation

Let the starting point, the house, be at the origin (0, 0) on a Cartesian plane where the positive x-axis represents east and the positive y-axis represents north.

First, the person goes 80 m east, reaching coordinate (80, 0). Second, turning left (north) for 20 m leads to (80, 20). Third, turning right (east) for 100 m leads to (180, 20). Fourth, turning left (north) for 60 m leads to (180, 80). Fifth, turning left (west) for 120 m leads to (60, 80).

The final position of the park is at coordinate (60, 80).

The shortest distance between the house at (0, 0) and the park at (60, 80) is determined using the distance formula:

Distance = √((60 - 0)² + (80 - 0)²) Distance = √(60² + 80²) Distance = √(3600 + 6400) Distance = √10000 Distance = 100 m

Explanation

The letters given are O (1), T (2), Y (3), S (4), R (5), H (6), and I (7). Unscrambling these letters to form a meaningful word gives HISTORY. Matching each letter of the word HISTORY with its corresponding numerical position, we get H as 6, I as 7, S as 4, T as 2, O as 1, R as 5, and Y as 3. This yields the correct numerical sequence 6742153.

Explanation

The first, fourth, seventh, and eleventh letters of the word SUPERFLUOUS are S, E, L, and S respectively. Arranging these letters in a meaningful order yields the word LESS. The first letter of this newly formed word is L.

Explanation

According to statement (ii), all pencils are pens. Since the entire set of pencils is contained within the set of pens, there must be at least some pens that are pencils. Therefore, conclusion I logically follows.

According to statement (i), some papers are pens. The relation "some" is symmetric, meaning that if there is an overlap between papers and pens, there is also an overlap between pens and papers. Therefore, some pens are papers, which makes conclusion II logically follow.

Explanation

Combining statement (i), which states that Roy studies History and Political Science, with statement (ii), which states that Roy studies in Oxford University, directly leads to the logical conclusion that Roy studies History and Political Science in Oxford University.

Explanation

To find a person's rank from the last, the standard formula is:

Rank from last = (Total number of students - Rank from start) + 1

Substituting the given values into the formula:

Rank from last = (46 - 22) + 1 Rank from last = 24 + 1 Rank from last = 25

Explanation

Let the market be represented as the origin point (0, 0). The north-west direction lies in the second quadrant, and the south-west direction lies in the third quadrant.

The position of the mall is 250 meters north-west of the market, which can be represented coordinates-wise as (-250 cos(45°), 250 sin(45°)), which simplifies to (-250/√2, 250/√2).

The position of the school is 250 meters south-west of the market, which is represented as (-250 cos(45°), -250 sin(45°)), simplifying to (-250/√2, -250/√2).

Comparing the two coordinates, both the mall and the school have the exact same x-coordinate (-250/√2), meaning they lie on the same vertical line. Since the y-coordinate of the school is negative while that of the mall is positive, the school is located directly below the mall, which is in the South direction.

Explanation

The pattern followed in the analogy is the subtraction of 3 from the alphabetical position of each letter. For the first term, S - 3 = P, U - 3 = R, M - 3 = J, and O - 3 = L. Applying this identical pattern to TAXI, we subtract 3 from each letter: T - 3 = Q, A - 3 = X, X - 3 = U, and I - 3 = F. This yields the code QXUF.

Explanation

The relationship between the first two words is that of synonyms. Concord is defined as agreement or harmony between people or groups. Following the same analogy, discord, which refers to a lack of agreement or harmony, is synonymous with conflict.

Explanation

The relationship in the first pair is noun to its corresponding adjective form. Feminine is the adjective associated with Female. Following the same analogy, the adjective associated with Male is Masculine.

Explanation

The relationship between the numbers in each pair follows the mathematical formula: y = (x ÷ 2) - 1

Applying this formula to the first pair where x = 42: y = (42 ÷ 2) - 1 = 21 - 1 = 20

Applying the same formula to the second pair where x = 64: y = (64 ÷ 2) - 1 = 32 - 1 = 31

Explanation

The letters in the first term are shifted forward by 6 positions to get the second term. In the English alphabet, P is the 16th letter and S is the 19th letter. Adding 6 to their positions gives 22 and 25, which correspond to V and Y respectively. Applying the same logic to FI, where F is the 6th letter and I is the 9th letter, we add 6 to both positions to get 12 and 15. The 12th letter is L and the 15th letter is O, which forms LO.

Explanation

The first pair shares the relationship of an activity and its classification, where carpentry is classified as a skill because it is an acquired trade or learned craft. In the second pair, singing is classified as a talent because it is primarily an innate, natural artistic ability.

Explanation

The relationship in the first ratio is that the second term is obtained by multiplying the first term by 1/2.

1/4 × 1/2 = 1/8

Using the same relationship for the second ratio:

2/3 × 1/2 = 1/3

Explanation

The first term KcaC is reversed to obtain the second term CacK, keeping the case of each letter intact. Applying the same logic to the third term, when the letters of XgmF are reversed, we obtain FmgX.

Explanation

The sum of the digits of the numbers in the given set (72, 66, 96) are 9 (7+2), 12 (6+6), and 15 (9+6) respectively. Similarly, in the option (54, 57, 78), the sum of the digits are 9 (5+4), 12 (5+7), and 15 (7+8) respectively, making D the correct choice.

Explanation

The pair Legumes : Nodules is the odd one out because it represents a plant-to-structure relationship, where nodules are physical structures found on the roots of legume plants. This is a whole-to-part relationship rather than an item-to-category classification, which makes it distinct from the common pattern shared by the other pairs.

Explanation

The letter group UVWX consists of consecutive letters arranged in ascending forward alphabetical order, where each successive letter increases by one position. The other groups consist of consecutive letters arranged in descending reverse alphabetical order, making this group the odd one out.

Explanation

The number 36 is the only perfect square in the group, as it is the square of 6 (6² = 36).

Explanation

The letter group WUSP is the odd one out because it does not follow the uniform pattern of decreasing alphabetical positions by 2 for each successive letter. The alphabetical positions for W, U, S, and P are 23, 21, 19, and 16, respectively. While the first three letters decrease by 2 (23 - 2 = 21, and 21 - 2 = 19), the final letter P is obtained by subtracting 3 from S (19 - 3 = 16), which breaks the consistent decrement of 2.

Explanation

The alphabetical positions of the letters in DAC, IFH, and NKM follow a consistent pattern of -3 and +2. For DAC, D(4) to A(1) is -3, and A(1) to C(3) is +2. For IFH, I(9) to F(6) is -3, and F(6) to H(8) is +2. For NKM, N(14) to K(11) is -3, and K(11) to M(13) is +2. In contrast, UTV does not follow this pattern because U(21) to T(20) is -1, and T(20) to V(22) is +2. This makes UTV the odd one out.

Explanation

In all the other number pairs, the sum of the digits of the first number is equal to the sum of the digits of the second number. For example, in the pair (36, 27), 3 + 6 = 9 and 2 + 7 = 9; in the pair (23, 14), 2 + 3 = 5 and 1 + 4 = 5; and in the pair (45, 18), 4 + 5 = 9 and 1 + 8 = 9.

In contrast, for the pair (82, 29), the sum of the digits of the first number is 8 + 2 = 10, while the sum of the digits of the second number is 2 + 9 = 11. Since these sums are not equal, this pair does not follow the common pattern.

Additionally, the difference between the two numbers in the other pairs is always a multiple of 9, whereas the difference in this pair is 82 - 29 = 53, which is not divisible by 9.

Explanation

A cone is a three-dimensional solid geometric shape that has a circular base tapering to a single point called the apex or vertex. This makes it distinct because all the other figures represented in the choices are two-dimensional plane shapes.