SSC CHSL Tier 1 2023 General Intelligence & Reasoning Questions with Solutions

Explanation

The series consists of three patterns: the first letter, the second letter, and the number.

For the first letter, the sequence is B, ?, F, H, J. In alphabetical positions, these are 2, ?, 6, 8, 10. This is an arithmetic progression with a common difference of +2. The missing position is 4, which corresponds to the letter D.

For the second letter, the sequence is P, ?, T, V, X. In alphabetical positions, these are 16, ?, 20, 22, 24. This is also an arithmetic progression with a common difference of +2. The missing position is 18, which corresponds to the letter R.

For the number, the sequence is 74, ?, 64, 59, 54. The difference between the successive known numbers is 5, as 59 - 54 = 5 and 64 - 59 = 5. Applying this constant decrease of 5, the missing number is 74 - 5 = 69, which is followed by 69 - 5 = 64.

Combining the elements, the missing term is DR 69.

Explanation

Correct Answer: B

The series is formed by applying a specific pattern to each letter position of the terms.

For the first letter of each term, the alphabetical positions increase by 2: F (6) → H (8) → J (10) → L (12). Following this pattern, the next letter is L + 2 = N (14).

For the second letter of each term, the alphabetical positions also increase by 2: G (7) → I (9) → K (11) → M (13). Following this pattern, the next letter is M + 2 = O (15).

For the third letter of each term, the alphabetical positions increase by 3: O (15) → R (18) → U (21) → X (24). Following this pattern, the next letter is X + 3 = 27. Since there are 26 letters in the alphabet, 27 wraps around to become the first letter, which is A (1).

Combining these letters yields NOA.

Explanation

For the pair 53 : 208, the relation is 53 × 4 - 4 = 208. This deviates from the logic followed by the other pairs, which conform to the pattern of (First number × 4) + 4 = Second number. Applying this pattern to 53 would yield 53 × 4 + 4 = 216.

Explanation

The common pattern among the grouped pairs is that the second number is the square of the first number, represented by the relation y = x². The pair 16- 276 does not follow this rule because the square of 16 is 256 (16² = 256), which is not equal to 276.

Explanation

The words in the given pair, Latent and Dormant, are synonyms. Latent refers to something that is existing but not yet developed or manifest, while dormant describes something that is temporarily inactive or in a state of rest.

Similarly, Picky and Fussy share a synonymous relationship. Both words are used to describe a person who is extremely selective, fastidious, or hard to please regarding small details.

Explanation

The given series is 9, 13, 21, 33, 49, X.

Calculating the differences between successive terms: 13 - 9 = 4 21 - 13 = 8 33 - 21 = 12 49 - 33 = 16

The differences form an arithmetic progression of 4, 8, 12, 16, which increases by 4 at each step. Following this pattern, the next difference must be 16 + 4 = 20.

Adding this difference to the last term gives the value of X: 49 + 20 = 69

Explanation

The given series follows an alternating addition pattern of 12 and 14.

First term = 417 Second term = 417 + 12 = 429 Third term = 429 + 14 = 443 Fourth term = 443 + 12 = 455 Fifth term = 455 + 14 = 469

Explanation

By interchanging the operators + and ×, the given equation is: 63 - 23 + 132 ÷ 12 × 7 = 117

Applying the BODMAS rule, first perform the division operation: 132 ÷ 12 = 11

The equation becomes: 63 - 23 + 11 × 7 = 117

Next, perform the multiplication operation: 11 × 7 = 77

The equation becomes: 63 - 23 + 77 = 117

Finally, perform the addition and subtraction from left to right: 40 + 77 = 117 117 = 117

Since the left-hand side equals the right-hand side, the equation is balanced.

Explanation

Decoding the given expression R # A - F # H step-by-step:

R # A means R is the mother of A. A - F means A is the husband of F.

Combining these relations, A is the husband of F, and R is the mother of A. This means R is the mother of F's husband. Therefore, R is the husband's mother to F.

Explanation

The relation between the letter-clusters is determined by the shifting pattern of the alphabetical positions of each letter: First letter: + 6 Second letter: - 2 Third letter: - 4

For the pair ZPJ : FNF: Z (26) + 6 = 32, which corresponds to 6 (F) P (16) - 2 = 14 (N) J (10) - 4 = 6 (F)

For the pair SNT : YLP: S (19) + 6 = 25 (Y) N (14) - 2 = 12 (L) T (20) - 4 = 16 (P)

Applying the same rule to RJX: R (18) + 6 = 24 (X) J (10) - 2 = 8 (H) X (24) - 4 = 20 (T)

This produces the cluster XHT.

Explanation

The relationship between the numbers in each triad (a - b - c) is defined by the formula: b = a × c

Applying this formula to the given triads: For the first triad 4- 24- 6: 4 × 6 = 24 For the second triad 2- 6- 3: 2 × 3 = 6

Similarly, for the triad 5- 35- 7: 5 × 7 = 35

This confirms that the triad follows the exact same mathematical logic as the given examples.

Explanation

Comparing the letters of the words EARNT and TUNER, the common letters present in both are E, R, N, and T. Looking at their respective codes 25371 and 57142, the common digits are 1, 2, 5, and 7. This means the letters E, R, N, and T are represented by the digits 1, 2, 5, and 7 in some order. The only letter in TUNER that is not present in EARNT is U, and the only digit in 57142 that is not present in 25371 is 4. Therefore, the code for U is 4.

Explanation

By comparing the words FROM and ROMP, the letters R, O, and M are common to both. Similarly, in their respective codes 8167 and 6218, the digits 8, 1, and 6 are common. This leaves the letter F in the first word and the digit 7 in its corresponding code, which means the code for F is 7.

Explanation

To solve the equation, the operators are interchanged as follows:

• and - are interchanged × and ÷ are interchanged

The given equation is: 109 - 55 × 605 ÷ 77 + 93 = ?

Applying the interchanges:

• becomes + × becomes ÷ ÷ becomes ×

• becomes -

This rewrites the expression as: 109 + 55 ÷ 605 × 77 - 93

According to the BODMAS rule, we perform the operations in the order of division, multiplication, addition, and subtraction:

First, perform the division: 55 ÷ 605 = 1/11

Next, perform the multiplication: 1/11 × 77 = 7

Finally, perform addition and subtraction: 109 + 7 - 93 = 116 - 93 = 23

Explanation

The given sequence decreases by consecutive powers of 3. The mathematical relation between successive terms is:

Tₙ₊₁ = Tₙ - 3ⁿ

Calculating the differences: 426 - 3¹ = 426 - 3 = 423 423 - 3² = 423 - 9 = 414 414 - 3³ = 414 - 27 = 387 387 - 3⁴ = 387 - 81 = 306

Following this pattern, the next term is obtained by subtracting 3⁵ from the preceding term: 306 - 3⁵ = 306 - 243 = 63

Explanation

The relationship between the categories can be analyzed using basic set relationships.

The first statement, some Hats are Caps, and the third statement, all Caps are Monkeys, together imply that some Hats are definitely Monkeys, as the intersecting part of Hats and Caps lies entirely within the set of Monkeys. However, this does not mean all Hats are Monkeys, so conclusion II does not logically follow.

The second statement shows that some Hats are Turbans, but there is no direct or indirect logical connection established between Turbans and Caps. They may or may not overlap. Since we cannot definitely conclude any relationship between them, conclusion I does not logically follow.

Thus, both conclusions do not follow.

Explanation

The series is formed by repeating and progressively doubling the letters of the sequence JKLM in groups of increasing length.

Dividing the completed series into logical groups reveals the pattern:

Group 1: J K L M (length 4) Group 2: J K L M (length 4) Group 3: J K K L M (length 5, where K is doubled) Group 4: J K K L L M (length 6, where both K and L are doubled)

By placing the letters L, K, L, and M sequentially into the blanks of the series J K _ M J _ L M J K K _ M J K K L L _, we get:

J K L M | J K L M | J K K L M | J K K L L M

This perfectly satisfies the progressive doubling pattern of the sequence.

Explanation

To determine how B is related to D in the expression A × B / C - D, we decode the relation step by step from left to right using the given definitions:

A × B means A is the wife of B. This implies that B is a male and is the husband of A.

B / C means B is the father of C.

C - D means C is the brother of D.

Since B is the father of C and C is the brother of D, B must be the father of D.

Explanation

The pattern in the series is determined by analyzing the alphabetical position of each letter in the terms, where A = 1, B = 2, ..., Z = 26.

First letter: Q (17) → T (20) → W (23) → Z (26) The pattern is +3. The next letter position is 26 + 3 = 29. Subtracting 26 for the alphabetical cycle gives 3, which is C.

Second letter: E (5) → K (11) → Q (17) → W (23) The pattern is +6. The next letter position is 23 + 6 = 29. Subtracting 26 for the alphabetical cycle gives 3, which is C.

Third letter: D (4) → M (13) → V (22) → E (31, or 5) The pattern is +9. The next letter position is 31 + 9 = 40. Subtracting 26 for the alphabetical cycle gives 14, which is N.

Combining these letters yields CCN.

Explanation

Dividing the 16-letter series into four groups of four letters each gives: Group 1: Z _ T S Group 2: V Z V _ Group 3: R _ X A Group 4: N P _ E

By filling the blanks with the letters R, W, H, and Z, the groups become: Group 1: Z R T S Group 2: V Z V W Group 3: R H X A Group 4: N P Z E

Analyzing the letters at each corresponding position across the four groups reveals a consistent arithmetic progression based on their alphabetical positions (A=1, B=2, ..., Z=26):

The first letters (Z, V, R, N) decrease by 4: 26 - 4 = 22 (V) 22 - 4 = 18 (R) 18 - 4 = 14 (N)

The second letters (R, Z, H, P) increase by 8, wrapping around the 26-letter alphabet: 18 + 8 = 26 (Z) 26 + 8 = 34, which wraps to 8 (H) 8 + 8 = 16 (P)

The third letters (T, V, X, Z) increase by 2: 20 + 2 = 22 (V) 22 + 2 = 24 (X) 24 + 2 = 26 (Z)

The fourth letters (S, W, A, E) increase by 4, wrapping around the alphabet: 19 + 4 = 23 (W) 23 + 4 = 27, which wraps to 1 (A) 1 + 4 = 5 (E)

Explanation

The relationship between the numbers is established by adding a constant value of 11 to the first number to obtain the second number.

For the first pair: 30 + 11 = 41

For the second pair: 56 + 11 = 67

Applying the same logic to the third pair: 12 + 11 = 23

Explanation

The given series can be divided into four groups of four letters each:

Group 1: X Y Z _ Group 2: U _ U S Group 3: R _ P Q Group 4: O M _ _

By comparing the corresponding letters of each group, we find a consistent decreasing pattern in their alphabetical positions:

First letter of each group: X (24) → U (21) → R (18) → O (15) (decreases by 3 at each step)

Second letter of each group: Y (25) → _ (U = 21) → _ (Q = 17) → M (13) (decreases by 4 at each step)

Third letter of each group: Z (26) → U (21) → P (16) → _ (K = 11) (decreases by 5 at each step)

Fourth letter of each group: _ (W = 23) → S (19) → Q (17) → ...

Following this pattern, the letters that sequentially fill the blanks are W, U, Q, and K.

Explanation

V is the mother of P, and P is the brother of K, which means V is also the mother of K. N is the brother of K, so P, K, and N are siblings. Since N is the father of T, and K is a female sibling of N, K is the sister of T's father. Thus, K is T's father's sister.

Explanation

Applying the operator interchange rules where '+' and '-' are interchanged, and '×' and '÷' are interchanged:

The original expression is: 29 ÷ 2 - 14 + 16 × 4

Replacing the operators according to the interchange rules: '÷' becomes '×' '-' becomes '+' '+' becomes '-' '×' becomes '÷'

This gives the modified expression: 29 × 2 + 14 - 16 ÷ 4

Solving the expression using the BODMAS rule:

First, perform the division: 16 ÷ 4 = 4

Next, perform the multiplication: 29 × 2 = 58

Finally, perform the addition and subtraction: 58 + 14 - 4 = 72 - 4 = 68

Explanation

The term UQT has letter transitions of -4 from U (21) to Q (17) and +3 from Q (17) to T (20). This differs from the +4 and -3 progression observed in the other groups, making it the odd one out.

Explanation

Correct Answer: D

The relation among the numbers in each triad (a : b : c) is defined by the following mathematical formulas: b = a³ - 1 c = 3a - 1

Applying this logic to the given triads:

For the first triad 3:26:8: b = 3³ - 1 = 27 - 1 = 26 c = 3 × 3 - 1 = 9 - 1 = 8

For the second triad 7:342:20: b = 7³ - 1 = 343 - 1 = 342 c = 3 × 7 - 1 = 21 - 1 = 20

Applying the same pattern to the triad 4:63:11: b = 4³ - 1 = 64 - 1 = 63 c = 3 × 4 - 1 = 12 - 1 = 11

Explanation

The expression is N % M # R @ L | K. Decoding the relations step by step:

N % M means N is the daughter of M. M # R means M is the father of R. R @ L means R is the son of L. Since M is the father of R, L must be the mother of R, making M and L husband and wife. L | K means L is the mother of K.

This establishes that M and L are a married couple, and their children are N, R, and K. Since N is the daughter of M, she is female. Therefore, N is the sister of K.

Explanation

The common pattern among the numbers is that the second number is obtained by multiplying the first number by 2 and then adding 1.

In the pair 27 - 53, this rule is not followed. Applying the pattern gives: 27 × 2 + 1 = 55

However, the second number provided is 53, which is obtained by subtracting 1: 27 × 2 - 1 = 53

Explanation

The given letter series can be completed logically by filling the blanks with the letters of Option C (TCTCCCCC) in the same sequence.

By substituting the letters of Option C into the blanks, the complete series becomes:

C T C C C T T C C C T C T C C C

This series can be divided into four groups of four letters each:

C T C C / C T T C / C C T C / T C C C

In these groups, the arrangement of C and T follows a logical, shifting pattern where the occurrence and position of the letter T varies systematically within each group of four.

Explanation

The series follows an alternating pattern of multiplying by 3 and subtracting 2.

Starting with the first term: 12 × 3 = 36 36 - 2 = 34 34 × 3 = 102 102 - 2 = 100 100 × 3 = 300

Applying this pattern, the missing number is 34.

Explanation

The given series is an arithmetic progression where each subsequent term is obtained by adding a constant difference of 90 to the preceding term.

110 - 20 = 90 200 - 110 = 90 290 - 200 = 90 380 - 290 = 90

Following this pattern, the next term in the series is obtained by adding 90 to 380:

380 + 90 = 470

Explanation

The relationship between the letter groups is established by shifting each letter backward by 5 positions in the English alphabetical order.

Applying this rule to the pair SVXY and NQST: S (19) - 5 = N (14) V (22) - 5 = Q (17) X (24) - 5 = S (19) Y (25) - 5 = T (20)

Following the same logic for NQST: N (14) - 5 = I (9) Q (17) - 5 = L (12) S (19) - 5 = N (14) T (20) - 5 = O (15)

This gives the letter group ILNO.

Explanation

The given series is 149, ?, 114, 89, 59, 24.

By analyzing the differences between consecutive terms from right to left, a clear pattern emerges: 59 - 24 = 35 89 - 59 = 30 114 - 89 = 25

The differences between successive terms decrease by 5 as we move from right to left (35, 30, 25). Following this pattern, the next differences must be 20 and 15.

Applying this pattern to find the missing term: ? - 114 = 20 ? = 114 + 20 = 134

We can verify this with the first term: 149 - 134 = 15

The pattern holds true, confirming that the missing number is 134.

Explanation

Each letter in the first group is shifted forward by 7 positions in the English alphabetical order to obtain the corresponding letter in the second group:

H (8) + 7 = 15 (O) J (10) + 7 = 17 (Q) L (12) + 7 = 19 (S) I (9) + 7 = 16 (P)

Similarly, applying this to the second pair: B (2) + 7 = 9 (I) D (4) + 7 = 11 (K) F (6) + 7 = 13 (M) C (3) + 7 = 10 (J)

Applying the same +7 alphabetical shift to each letter of NPRO: N (14) + 7 = 21 (U) P (16) + 7 = 23 (W) R (18) + 7 = 25 (Y) O (15) + 7 = 22 (V)

This gives the letters U, W, V, Y.

Explanation

Decoding the given expression D - E # F - G step-by-step:

D - E means D is the brother of E. E # F means E is the father of F. F - G means F is the brother of G.

Since E is the father of F, and F is the brother of G, E is the father of G. As D is the brother of E, D is the father's brother of G.

Explanation

The statement that all seeds are pots means the set of seeds is entirely contained within the set of pots. The statement that no flowers are seeds means the set of flowers has no overlap with the set of seeds.

To evaluate conclusion (I), some leaves are flowers, which means there is an intersection between leaves and flowers. However, this provides no information about any connection between seeds and leaves. Since they can be entirely disjoint, conclusion (I) does not logically follow.

To evaluate conclusion (II), while no flowers are seeds, the set of pots is larger than the set of seeds. The portion of pots that does not contain seeds can overlap with the set of flowers. Therefore, it is possible for some pots to be flowers, meaning we cannot definitely conclude that no pots are flowers. Thus, conclusion (II) does not logically follow.

Explanation

The relationship between the numbers in each set is (First number * Third number) + 7 = Second number. Applying this logic to (36, 223, 6), we get 36 * 6 + 7 = 216 + 7 = 223, which is correct.

Explanation

The coding scheme adds 3 to the alphabetical position of each letter in the word and then concatenates the resulting numbers.

For LED: L is the 12th letter: 12 + 3 = 15 E is the 5th letter: 5 + 3 = 8 D is the 4th letter: 4 + 3 = 7 Combining these results gives 1587.

For BAN: B is the 2nd letter: 2 + 3 = 5 A is the 1st letter: 1 + 3 = 4 N is the 14th letter: 14 + 3 = 17 Combining these results gives 5417.

Applying the same logic to HIT: H is the 8th letter: 8 + 3 = 11 I is the 9th letter: 9 + 3 = 12 T is the 20th letter: 20 + 3 = 23 Combining these results gives 111223.

Explanation

IJH consists of letters with alphabetical positions I = 9, J = 10, and H = 8. The difference between the first and second letter is +1 (I to J), and the difference between the second and third letter is -2 (J to H). This step sequence of +1 and -2 is different from the other three letter-clusters, which all follow a consistent pattern of +1 and -3 between consecutive letters.

Explanation

The series is divided into three groups of letters based on the repeating core pattern ZYXW:

First group: Z Y X W (4 letters) Second group: W Z Y X W (5 letters, where W is prefixed to the core pattern) Third group: Z Z Y X W (5 letters, where Z is prefixed to the core pattern)

By sequentially placing the letters of the option YWZZ in the blanks, we complete this pattern: Z [Y] X W [W] Z Y X W [Z] [Z] Y X W

Explanation

The logic followed in the given pairs is x → x² + 2, where the first number is squared and then 2 is added to get the second number.

Applying this logic to the first pair: 5² + 2 = 25 + 2 = 27

Applying this logic to the second pair: 7² + 2 = 49 + 2 = 51

Following the same logic for 9: 9² + 2 = 81 + 2 = 83

Explanation

We write the original word and arrange its letters in alphabetical order to compare their positions:

Original word: E L A S T I C Alphabetical order: A C E I L S T

Comparing the letters at each position from left to right: First position: E changes to A Second position: L changes to C Third position: A changes to E Fourth position: S changes to I Fifth position: T changes to L Sixth position: I changes to S Seventh position: C changes to T

None of the letters remain in their original position after alphabetical rearrangement.

Explanation

In Sentence 2, 'table woods chair stools' is coded as 'rip nip dip pip'.

By comparing Sentence 1 ('doors grills windows woods clothes' coded as 'kip dip lip sip tip') and Sentence 2, the common word is 'woods' and the common code is 'dip', meaning 'woods' is coded as 'dip'.

By comparing Sentence 2 and Sentence 3 ('chair grills stools' coded as 'rip pip kip'), the common words are 'chair' and 'stools', and the common codes are 'rip' and 'pip'. Therefore, 'chair' and 'stools' are coded as 'rip' and 'pip' in some order.

Since 'woods', 'chair', and 'stools' account for the codes 'dip', 'rip', and 'pip', the only remaining word in Sentence 2, 'table', must be coded as the remaining code, 'nip'.

Explanation

Each letter in the first group is shifted forward by two positions in the English alphabetical order to obtain the corresponding letter in the second group.

Applying this logic to MPSV: M + 2 = O P + 2 = R S + 2 = U V + 2 = X

Similarly, for CFIL: C + 2 = E F + 2 = H I + 2 = K L + 2 = N

Applying the same shift of +2 to ORUX: O + 2 = Q R + 2 = T U + 2 = W X + 2 = Z

This yields the letters QTWZ.

Explanation

To find the relationship between F and S from the expression F + L × C + A - S, we decode the relations step-by-step:

A - S means A is the father of S.

C + A means C is the wife of A. Since A is the father of S, C is the mother of S.

L × C means L is the brother of C.

F + L means F is the sister of L.

Since F is the sister of L, and L is the brother of C, F is the sister of C. Since C is the mother of S, F is S's mother's sister.

Explanation

The statement "All caps are bikes" combined with "All bikes are pins" implies that all caps are pins. Since all caps are pins, the statement "Some caps are not pins" in Conclusion (II) is false.

Additionally, the statement "Some tables are caps" means there is an overlap between tables and caps. Since all caps are pins, any table that is a cap must also be a pin. This guarantees an overlap between pins and tables, making Conclusion (I) "Some pins are tables" logically true.

Explanation

The relationship between the terms is established by shifting each letter forward by 7 positions in the English alphabetical order.

Applying this constant addition of 7 to each letter of HJLI: The alphabetical position of H is 8, and 8 + 7 = 15, which is O. The alphabetical position of J is 10, and 10 + 7 = 17, which is Q. The alphabetical position of L is 12, and 12 + 7 = 19, which is S. The alphabetical position of I is 9, and 9 + 7 = 16, which is P.

Combining these letters in sequence yields OQSP.

Explanation

After interchanging the mathematical signs "+" with "-" and "×" with "÷" in the given equation:

6 + 15 × 5 - 4 ÷ 3 = ?

The equation becomes:

6 - 15 ÷ 5 + 4 × 3 = ?

According to the BODMAS rule, the operations are performed in the order of Division, Multiplication, Addition, and then Subtraction.

First, perform the division: 15 ÷ 5 = 3 This gives: 6 - 3 + 4 × 3

Next, perform the multiplication: 4 × 3 = 12 This gives: 6 - 3 + 12

Finally, perform the addition and subtraction: 6 - 3 + 12 = 3 + 12 = 15

Explanation

The given series follows a specific pattern for each letter position in the terms, based on their alphabetical positions where A = 1, B = 2, ..., Z = 26.

For the first letter, the pattern is to add 4 to the alphabetical position of the preceding first letter: R (18) + 4 = V (22) V (22) + 4 = Z (26) Z (26) + 4 = D (4, since 26 + 4 = 30, which wraps around to 4) D (4) + 4 = H (8)

For the second letter, the pattern is to subtract 2 from the alphabetical position of the preceding second letter: N (14) - 2 = L (12) L (12) - 2 = J (10) J (10) - 2 = H (8) H (8) - 2 = F (6)

For the third letter, the pattern is to add 4 to the alphabetical position of the preceding third letter: Z (26) + 4 = D (4, wrapping around) D (4) + 4 = H (8) H (8) + 4 = L (12) L (12) + 4 = P (16)

Combining these positions gives the next term as HFP.

Explanation

The given expression is 245 ÷ 7 × 12 + 46 - 59.

Interchanging the plus and minus signs yields the modified equation: 245 ÷ 7 × 12 - 46 + 59 = ?

Applying the BODMAS rule, perform division first: 245 ÷ 7 = 35

Then, perform multiplication: 35 × 12 = 420

Finally, solve the remaining subtraction and addition from left to right: 420 - 46 + 59 = 374 + 59 = 433