SSC CHSL Tier 1 2012 General Intelligence & Reasoning Questions with Solutions

Explanation

In QRP, all three letters are consonants. The first and last letters are consecutive in reverse alphabetical order (Q and P), enclosing the consonant R in the middle. This group is different because it consists entirely of consonants and contains no vowels, whereas the other groups each contain a vowel in the middle position.

Explanation

The number 126 follows the mathematical pattern of n³ + 1, where n is equal to 5, as calculated by 5³ + 1 = 125 + 1 = 126. The remaining numbers in the group all follow the mathematical pattern of n³ - 1, which represents a value that is exactly one less than a perfect cube.

Explanation

The meaningful sequence represents the chronological stages of growth from a seed to a fruit-bearing tree. First, a seed (2) germinates and grows into a small plant (3). Over time, this plant grows into a full-sized tree (6). The tree then develops branches (5). On these branches, flowers (1) begin to bloom, which finally develop into fruits (4).

Explanation

The logical and meaningful order of these body parts represents a sequence starting from the top of the upper limb and moving downward to the tip. This proximal-to-distal anatomical arrangement begins at the shoulder (3), moves down to the arm (2), passes through the wrist (1), reaches the palm (5), extends to the finger (4), and ends with the nail (6) at the very tip.

Explanation

The given series is formed by applying separate patterns to each letter position.

The first letter of each term increases by two steps in alphabetical order: E, G, I, K, M.

The second letter of each term remains constant: L.

The third letter of each term increases by two steps in alphabetical order: F, H, J, L, N.

The fourth letter of each term remains constant: A.

Combining these letters in sequence yields KLLA.

Explanation

The series increases by adding differences that follow the formula n² - 1, starting with n = 5.

The first difference is: 39 - 15 = 24, which is 5² - 1

The second difference is: 74 - 39 = 35, which is 6² - 1

The third difference is: 122 - 74 = 48, which is 7² - 1

Following this pattern, the next difference must be: 8² - 1 = 63

Adding 63 to 122 gives: 122 + 63 = 185

To verify the pattern with the final number: 185 + (9² - 1) = 185 + 80 = 265

This perfectly matches the last term in the series.

Explanation

The series is formed by the alternating repetition of the three-letter groups lub and tub:

lub / tub / lub / tub / lub / tub

By replacing the starting digit 1 with the lowercase letter l and sequentially inserting the letters from option B (u, t, l, u, b) into the five gaps, the complete pattern is obtained:

l u b t u b l u b t u b l u b t u b

This yields the correct alternating sequence of lub and tub throughout.

Explanation

The given sequence follows an alternating addition pattern of adding 1 and then adding 3.

23 + 1 = 24 24 + 3 = 27 27 + 1 = 28 28 + 3 = 31 31 + 1 = 32

Following this pattern, the next operation is to add 3 to the last term, which gives: 32 + 3 = 35

Explanation

The position numbers of the letters in each group follow a specific arithmetic progression.

In the first group, E, G, I: E = 5, G = 7, I = 9 The common difference is +2.

In the second group, R, U, X: R = 18, U = 21, X = 24 The common difference is +3.

Following this pattern, the common difference in the third group, J, N, ?, must be +4. J = 10, N = 14 Adding +4 to N (14) gives 18, which corresponds to the letter R.

Explanation

The given series is a sequence of consecutive prime numbers. The prime numbers in order starting from 17 are 17, 19, 23, and 29. The prime number that immediately follows 29 is 31.

Explanation

The pair 169-600 contains the number 600, which is not a perfect square, making this pair the odd one out as the common property of the group requires both numbers in the pair to be perfect squares.

Explanation

Vipin's mother-in-law has only one daughter, who must be Vipin's wife. The statement says that the girl's mother is this only daughter. Therefore, the girl's mother is Vipin's wife, which makes Vipin the father of the girl.

Explanation

Let A and B represent the number of students in class A and class B at the beginning, respectively.

The total number of students is 120: A + B = 120 From this, we get: B = 120 - A

If 15 students from class A are added to class B, the new strength of class A is A - 15 and class B is B + 15. At this point, the strength of class B is twice that of class A: B + 15 = 2 × (A - 15)

Substituting B = 120 - A into this equation: 120 - A + 15 = 2A - 30 135 - A = 2A - 30 3A = 165 A = 55

Explanation

Govind is the brother of Lakshmi, and Lakshmi is the daughter of Kumar. This makes Govind and Lakshmi siblings, with Kumar as their parent. Since Kannan is the brother of Kumar, Kannan is the uncle of Kumar's children. Thus, Kannan is the uncle of Govind.

Explanation

The word COMMENTARY contains the letter Y. However, the parent word RECOMMENDATION does not contain the letter Y. Since the letter Y is completely absent from RECOMMENDATION, the word COMMENTARY cannot be formed using its letters.

Explanation

The word NATION cannot be formed from the letters of the word OPERATION because NATION requires two occurrences of the letter N, whereas the word OPERATION contains only a single letter N.

Explanation

The coding pattern reverses the letters of the given word.

Reversing the letters of the word BASKET from right to left gives TEKSAB.

Following the same pattern, reversing the letters of the word PILLOW gives WOLLIP.

Explanation

The coding pattern involves dividing the six-letter word into two halves of three letters each and then reversing the order of the letters in each half.

For the word TOPPER: First half is TOP, which when reversed becomes POT. Second half is PER, which when reversed becomes REP. Combining them gives the coded word POTREP.

Applying this same rule to find the word that corresponds to the code RUBREG: The first three letters RUB reversed becomes BUR. The last three letters REG reversed becomes GER. Combining these two parts gives the original word BURGER.

Explanation

Each letter is shifted forward by two positions (+2) in alphabetical order:

E + 2 = G (coded as C) A + 2 = C R + 2 = T N + 2 = P

Following this rule, the letters of NEAR are shifted:

N + 2 = P E + 2 = G A + 2 = C R + 2 = T

Explanation

By considering the equation as (23 - 5) (12 ÷ 2) 3 and substituting the signs from option D (÷ and =), the equation is solved.

First, simplify the expressions inside the parentheses: (23 - 5) = 18 (12 ÷ 2) = 6

Now, substitute the signs ÷ and = in place of the asterisks: 18 ÷ 6 = 3

Solving the division on the left-hand side: 3 = 3

This balances the equation perfectly.

Explanation

Applying the specified sign interchanges, the minus (-) and plus (+) signs are swapped, and the multiplication (x) and division (÷) signs are swapped.

The original equation is: 10 - 2 + 12 × 1 ÷ 0

Replacing the operators according to the rule gives: 10 + 2 - 12 ÷ 1 × 0

Following the standard BODMAS rule of mathematical operations:

First, perform the division: 12 ÷ 1 = 12

The equation becomes: 10 + 2 - 12 × 0

Next, perform the multiplication: 12 × 0 = 0

The equation becomes: 10 + 2 - 0

Finally, perform the addition and subtraction: 12 - 0 = 12

Explanation

To solve this seating arrangement of six people (A, B, C, D, E, and F) facing towards the center of a circle, we can place them in six positions numbered 1 to 6 in a clockwise direction.

Let D be seated at position 1.

Since they are facing the center, moving clockwise represents the left direction, and moving counter-clockwise represents the right direction.

A is second to the left of D, which places A at position 3 (two steps clockwise from position 1).

A is also second to the right of E. Since moving counter-clockwise represents the right direction, E must be at position 5 so that A (at position 3) is two steps to E's right.

D is seated between F and B, meaning F and B must occupy positions 2 and 6 in some order.

The only remaining position is position 4, which must be occupied by C.

In a six-person circular arrangement, the person directly opposite to the person at position 1 is at position 4. Since position 1 is occupied by D and position 4 is occupied by C, C is facing towards D.

Explanation

The statement establishes that uneducated people suffer exploitation by others in society. Conclusion I does not follow because the statement does not suggest that exploitation is exclusive to uneducated people; the use of the word "only" makes the conclusion overly restrictive and incorrect. Conclusion II does not follow because the phrase "others in the society" is general and does not specifically identify educated people as the exploiters. Since neither of the conclusions can be logically derived from the given statement, neither conclusion follows.

Explanation

The second statement is "Some black things are beautiful". In classical logic, a particular affirmative proposition of the form "Some A are B" can be converted to its converse "Some B are A". Applying this rule of conversion directly yields "Some beautiful things are black", which makes conclusion II logically valid.

Explanation

The seniority relation is transitive. The given statements can be represented as: Rakesh > Rajesh Rajesh > Rahul

Combining these two relations yields: Rakesh > Rajesh > Rahul

This directly implies: Rakesh is senior to Rahul, which makes conclusion I logically correct. Since Rakesh is senior to Rahul, it is also true that Rahul is not senior to Rakesh, which makes conclusion II logically correct. Therefore, both conclusions follow from the given statements.

Explanation

The relationship between the letters of the word DONKEY and its coded version ENOJFX follows an alternating addition and subtraction of 1 (+1, -1, +1, -1, +1, -1) to the positional values of the alphabets:

D (+1) → E O (-1) → N N (+1) → O K (-1) → J E (+1) → F Y (-1) → X

Applying the same logic to the word FLOWER:

F (+1) → G L (-1) → K O (+1) → P W (-1) → V E (+1) → F R (-1) → Q

This yields the coded word GKPVFQ.

Explanation

The relationship in the given analogy is based on the medium or pathway on which the vehicle travels. A plane is a vehicle designed to travel through the air. Similarly, a car is a vehicle designed to travel on the road.

Explanation

Tears represents a secretion or bodily fluid produced by the lacrimal glands, whereas the other three options are primary sensory organs of the human body.

Explanation

Calculating the differences between the two numbers in each pair reveals the following:

For 35-66, the difference is 66 - 35 = 31. For 71-94, the difference is 94 - 71 = 23. For 24-57, the difference is 57 - 24 = 33. For 56-70, the difference is 70 - 56 = 14.

The difference in option D is an even number (14), whereas the difference in each of the other options is an odd number (31, 23, and 33).

Explanation

The given series consists of groups of three consecutive alphabetical letters. Examining the first letter of each group reveals a constant difference of 6 in their positions in the alphabet: A (1), G (7), and M (13). Adding 6 to M (13) gives the 19th letter, which is S. Following this pattern of adding 6 for the subsequent letters in each group, the second letters progress from B (2), H (8), and N (14) to T (20), and the third letters progress from C (3), I (9), and O (15) to U (21). This sequence of additions produces the group STU.

Explanation

The word CHARACTERISATION does not contain the letter F. Therefore, the word FRICTION cannot be formed using its letters.

Explanation

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

Comparing the first three letters of each word, Convenience begins with C-o-n. Since n comes before o and r, Convenience (4) is first.

Next, Co-operate begins with C-o-o. Since o comes before r, Co-operate (5) is second.

The remaining three words all begin with C-o-r. Comparing their fourth letters, Corporate has p, while Correlation and Correspond have r. Since p comes before r, Corporate (1) is third.

For the remaining two words starting with C-o-r-r-e, we compare their sixth letters. Correlation has l, while Correspond has s. Since l comes before s, Correlation (3) is fourth and Correspond (2) is fifth.

This yields the complete dictionary order as 4, 5, 1, 3, 2.

Explanation

The given letter series is completed by repeating the six-letter pattern aabbcc.

Dividing the completed series into groups of six letters yields three identical repeating blocks:

aabbcc | aabbcc | aabbcc

By sequentially placing the letters b, c, a, b into the four gaps, the series is filled as follows:

aa(b)bcc | aabbc(c) | a(a)b(b)cc

This completes the pattern perfectly, meaning the correct sequence of letters to fill the gaps is b, c, a, b.

Explanation

The terms of the series are generated by multiplying each number by successive integers and then adding 2 to the result.

First term: 3 Second term: 3 × 1 + 2 = 5 Third term: 5 × 2 + 2 = 12 Fourth term: 12 × 3 + 2 = 38 Fifth term: 38 × 4 + 2 = 154 Sixth term: 154 × 5 + 2 = 772 Seventh term: 772 × 6 + 2 = 4634

This pattern requires the fourth term to be 38 instead of 39.

Explanation

The ratio of division among A, B, and C is given as 3:5:7.

The sum of the ratio terms is 3 + 5 + 7 = 15.

Using the direct formula to calculate an individual share:

B's share = (B's ratio term / Sum of ratio terms) × Total amount

Substituting the values:

B's share = (5 / 15) × 600

B's share = (1 / 3) × 600 = 200

Explanation

The coding pattern involves shifting the first two letters of the word to the very end while keeping the remaining letters in their original sequence.

Applying this rule to the word EXAMINATION, the first two letters EX are moved to the end of the remaining string AMINATION, resulting in AMINATIONEX.

Using the exact same logic for the word EXTRAPOLATION, the first two letters EX are shifted to the end of the remaining string TRAPOLATION, yielding TRAPOLATIONEX.

Explanation

The given equations establish a direct, reciprocal substitution cipher between digits: 1 is paired with 6 (and 6 with 1) 2 is paired with 7 (and 7 with 2) 3 is paired with 8 (and 8 with 3) 4 is paired with 9 (and 9 with 4) 5 is paired with 0 (and 0 with 5)

Applying this decoding rule to the number 786: The first digit 7 corresponds to 2. The second digit 8 corresponds to 3. The third digit 6 corresponds to 1.

Combining these mapped digits in order gives 231.

Explanation

The analogy is based on the relationship between a comic performer and the medium or venue of their performance. A buffoon is a comic character who performs and provides amusement in a drama. Similarly, a joker is a comic character who performs and provides entertainment in a circus.

Explanation

The analogy represents the relationship between a plant organ and its primary physiological function. Just as the primary function of a leaf is to perform photosynthesis to synthesize food for the plant, the primary physiological function of plant roots is the absorption of water and essential mineral nutrients from the soil to sustain the plant's growth.

Explanation

The relationship between the terms follows a specific pattern for the first/last letters and the middle letters.

The first and last letters of each term are identical vowels that progress in alphabetical order: A in APQA, E in ERSE, I in ITUI, and O in the next term.

The middle letters shift forward by two positions in the alphabet from one term to the next. For the second letter, the progression is P to R to T, which leads to V. For the third letter, the progression is Q to S to U, which leads to W.

Combining these two patterns results in OVWO.

Explanation

The relationship between the letter groups is based on opposite alphabetical positions, where the sum of the positions of corresponding letters from the start and the end of the alphabet is always 27.

In the first pair, BDFH is related to YWUS as follows: B is 2nd from the start, Y is 2nd from the end (2 + 25 = 27) D is 4th from the start, W is 4th from the end (4 + 23 = 27) F is 6th from the start, U is 6th from the end (6 + 21 = 27) H is 8th from the start, S is 8th from the end (8 + 19 = 27)

Applying this same logic to GIKM: G is 7th from the start, which pairs with T, the 7th letter from the end (7 + 20 = 27) I is 9th from the start, which pairs with R, the 9th letter from the end (9 + 18 = 27) K is 11th from the start, which pairs with P, the 11th letter from the end (11 + 16 = 27) M is 13th from the start, which pairs with N, the 13th letter from the end (13 + 14 = 27)

This yields the letter group TRPN.

Explanation

The relationship in this analogy is based on consecutive prime numbers. In the first pair, 2 is a prime number and the immediate next prime number is 3. Following the same logic for the second pair, 11 is a prime number and the immediate next prime number is 13.

Explanation

The relationship between the terms in each pair is based on the exponents of their respective bases:

In the first pair, the base is 8: The first term is 1/8, which can be written as 8⁻¹. The second term is 8, which can be written as 8¹. Here, the exponent increases by 2 (from -1 to 1).

In the second pair, the base is 3: The third term is 3, which can be written as 3¹. Following the same logic, the exponent of the fourth term must also increase by 2 (from 1 to 3). Thus, the fourth term is 3³ = 27.

Explanation

Crab is an invertebrate animal belonging to the phylum Arthropoda and class Crustacea, characterized by a hard exoskeleton and the absence of a backbone, whereas the others are all vertebrate animals.

Explanation

A calculator is a standalone, independent electronic device used specifically for performing arithmetic operations, while the other items are peripheral devices that must connect to a computer system to function.

Explanation

The classification of letters into vowels and consonants determines the odd group. In the pair NO, the letter N is a consonant and O is a vowel. All other pairs consist entirely of vowels, making this pair distinct from the rest.

Explanation

In the sequence UTV, the letters are not in consecutive alphabetical order. The standard alphabetical order for these letters is T, U, V. In UTV, the second letter T actually precedes the first letter U in the alphabet, which breaks the consecutive forward progression.

Explanation

In the sequence of numbers 10, 14, 16, 18, 21, and 24, all of them are even numbers with the exception of 21, which is an odd number.

Explanation

The difference between consecutive terms in the series follows the pattern of perfect squares of consecutive integers starting from 2:

6 - 2 = 4 = 2² 15 - 6 = 9 = 3² 31 - 15 = 16 = 4² 56 - 31 = 25 = 5²

Following this pattern, the next difference must be 6² = 36. The next term in the series should therefore be 56 + 36 = 92. Since the term given in the series is 93, it does not fit the pattern.

Explanation

To arrange the words in dictionary order, compare them letter by letter from left to right. All five words begin with the prefix Bl.

Comparing the third letters, we have a in Black, o in Blow, Bloat, and Block, and u in Blue. Since a comes before o, and o comes before u, Black (1) is the first word in the sequence, and Blue (3) is the last word.

To arrange the remaining words Blow (2), Bloat (4), and Block (5) which all share the third letter o, we compare their fourth letters. These are a in Bloat, c in Block, and w in Blow. Alphabetically, a comes before c, which comes before w, meaning Bloat (4) is followed by Block (5), and then Blow (2).

Combining these positions gives the final sorted sequence: Black (1), Bloat (4), Block (5), Blow (2), Blue (3).