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

Explanation

Conclusion II follows because the only restriction on ducks is that they cannot be eagles (No duck is an eagle). Since all eagles are snakes, this means ducks cannot overlap with the eagle portion of snakes. However, they are free to overlap with the non-eagle portion of snakes. Thus, the scenario where some ducks are snakes is entirely possible, making the possibility statement in Conclusion II true.

Explanation

By combining the statements "All branches are leaves" and "No flowers are leaves", we can deduce that since all branches are contained entirely within the set of leaves, and the set of leaves has no intersection with the set of flowers, there can be no intersection between branches and flowers. This makes conclusion (I) logically follow.

Regarding conclusion (II), while all flowers are trees and no flowers are leaves, this only means that the portion of trees that are flowers cannot be leaves. It does not restrict the remaining part of trees from overlapping with leaves. Therefore, it is possible for some trees to be leaves, which means conclusion (II) does not logically follow.

Explanation

The terms in the series follow three separate arithmetic progressions for the first letter, the middle number, and the last letter.

For the first letter, the alphabetical positions increase by 2, moving from D (4) to F (6), then to H (8), followed by J (10) and L (12).

For the middle number, the value increases by a constant difference of 4, progressing from 13 to 17, then to 21, followed by 25 and 29.

For the last letter, the alphabetical positions increase by 1, moving from Q (17) to R (18), then to S (19), followed by T (20) and U (21).

This yields the complete term H 21 S.

Explanation

The third day after Sunday is Wednesday (Sunday + 3 days = Wednesday). Therefore, the 5th of the month falls on Wednesday.

To find the day on the 15th of the month, we calculate the number of days between the 5th and the 15th, which is 15 - 5 = 10 days.

Dividing 10 by 7 gives a remainder of 3 days (10 = 1 week + 3 days). Adding 3 days to Wednesday gives Saturday.

Explanation

The relationship between the letter clusters is established by adding 4 to the alphabetical position of each letter.

In the first pair AHL to ELP: A (1) + 4 = E (5) H (8) + 4 = L (12) L (12) + 4 = P (16)

In the second pair GMP to KQT: G (7) + 4 = K (11) M (13) + 4 = Q (17) P (16) + 4 = T (20)

Applying this same logic to FQS: F (6) + 4 = J (10) Q (17) + 4 = U (21) S (19) + 4 = W (23)

This yields the letters JUW.

Explanation

The letters in the word ACTION are A, C, T, I, O, and N, and the letters in the word OCTANE are O, C, T, A, N, and E.

By comparing the two words, the common letters are A, C, T, O, and N. The letter unique to ACTION is I, and the letter unique to OCTANE is E.

Comparing their respective numeric codes, the digits for ACTION are 5, 2, 7, 4, 9, 1 and the digits for OCTANE are 7, 5, 9, 2, 1, 3. The common digits in both codes are 1, 2, 5, 7, and 9, which correspond to the five common letters.

The unique digit in the code for OCTANE is 3, which directly corresponds to the unique letter E.

Explanation

The pattern of the series involves adding 2 to the alphabetical position of each letter in the successive clusters:

First letter: X (+2) → Z (+2) → B (+2) → D (+2) → F Second letter: E (+2) → G (+2) → I (+2) → K (+2) → M Third letter: M (+2) → O (+2) → Q (+2) → S (+2) → U

Following this constant addition of +2 to each position of the letter-cluster, the next term in the sequence is FMU.

Explanation

To find the day of the week on 5 February 2025 given that 21 February 2017 was Tuesday, we calculate the total net shift in days between the two dates.

First, calculate the shift in days for the 8-year period from 21 February 2017 to 21 February 2025: Total years = 2025 - 2017 = 8 years. Among these, 2020 and 2024 are leap years (2 leap years), and the remaining 6 are ordinary years. Odd days from these years = (6 × 1) + (2 × 2) = 10 odd days.

Next, we go backward from 21 February 2025 to 5 February 2025: Difference in days = 5 - 21 = -16 days.

Combining these two steps gives the total net shift: Net shift = 10 - 16 = -6 days. A shift of -6 days is equivalent to a shift of +1 day (since -6 + 7 = 1).

Adding 1 day to the starting day of Tuesday: Tuesday + 1 day = Wednesday.

Explanation

Comparing the two coded statements, the word "ask" is the only common word between "ask the doctor" and "you can ask".

Similarly, looking at their corresponding codes "nq sp ml" and "j ml tr", the only common code present in both sets is "ml".

By matching the common word with the common code, "ask" is coded as "ml".

Explanation

Correct Answer: D

The series follows a pattern where each subsequent number is obtained by multiplying the previous term by consecutive integers starting from 2, and then adding the square of that same integer.

The mathematical formulation for the sequence is: Term(n) = Term(n-1) × n + n²

Applying this rule step-by-step: Second term = (3 × 2) + 2² = 6 + 4 = 10 Third term = (10 × 3) + 3² = 30 + 9 = 39 Fourth term = (39 × 4) + 4² = 156 + 16 = 172 Fifth term = (172 × 5) + 5² = 860 + 25 = 885 Sixth term = (885 × 6) + 6² = 5310 + 36 = 5346 Seventh term = (5346 × 7) + 7² = 37422 + 49 = 37471

Following this established logic, the missing number in the series is 172.

Explanation

The relation among the numbers in each triad follows the pattern x : x² : x³ where the second number is the square of the first number and the third number is the cube of the first number.

In the first example, 6 : 6² : 6³ equals 6 : 36 : 216. In the second example, 17 : 17² : 17³ equals 17 : 289 : 4913.

Applying this same pattern to the correct option where the first number is 21: The second number is 21² = 441. The third number is 21³ = 9261.

This gives the triad 21 : 441 : 9261.

Explanation

P is the father of E (female), A, and L. Since E is the sister of A, and A has only one brother L, the children of P are E, A, and L, with L being male.

M is the wife of A, which means A is male. Since only one child of P is married, A is the only married child of P.

T is the grandson of P. Because A is the only married child of P, T must be the son of A and M, making A the father of T.

Since L is the brother of A, L is the brother of T's father. Therefore, L is T's father's brother.

Explanation

The standard alphabetical positions of the letters in each group are used to determine the pattern. For the other three groups, the second letter is 2 positions backward from the first letter (-2), and the third letter is 3 positions forward from the second letter (+3). In the case of BEH, the alphabetical positions are B = 2, E = 5, and H = 8. The step from B to E is +3, and the step from E to H is +3. Since BEH follows a +3, +3 pattern instead of the -2, +3 pattern, it does not belong to the group.

Explanation

By interchanging the mathematical signs according to the rules: Plus (+) and minus (-) are interchanged: + becomes - and - becomes + Multiplication (×) and division (÷) are interchanged: × becomes ÷ and ÷ becomes ×

The original equation is: 27 ÷ 3 - 84 + 65 × 5 = ?

Replacing the signs as per the interchange rules, the equation becomes: 27 × 3 + 84 - 65 ÷ 5 = ?

Now, solving the expression using the BODMAS rule:

First, perform the division operation: 65 ÷ 5 = 13 The equation becomes: 27 × 3 + 84 - 13 = ?

Next, perform the multiplication operation: 27 × 3 = 81 The equation becomes: 81 + 84 - 13 = ?

Next, perform the addition operation: 81 + 84 = 165 The equation becomes: 165 - 13 = ?

Finally, perform the subtraction operation: 165 - 13 = 152

Explanation

The series follows a repeating pattern of the three-letter unit MMJ:

MMJ MMJ MMJ MMJ

Placing the letters from MMJMMJ into the blanks completes this repetitive sequence:

M [M] J [M] M [J] M [M] J [M] M [J]

This maintains the repeating MMJ pattern throughout the series.

Explanation

The given series is an alternating series consisting of two interwoven sequences.

The first sequence comprises the terms at odd positions: 222, 227, 232, ... The second sequence comprises the terms at even positions: 254, 249, 244, ...

In the first sequence, each term increases by 5: 222 + 5 = 227 227 + 5 = 232

In the second sequence, each term decreases by 5: 254 - 5 = 249 249 - 5 = 244

The missing number is the seventh term, which belongs to the first sequence. Calculating the next term: 232 + 5 = 237

Explanation

By interchanging the mathematical signs '+' with '-' and '×' with '÷', the given expression becomes:

214 + 65 ÷ 5 × 7 - 21

According to the BODMAS rule, division is performed first: 65 ÷ 5 = 13

Then, multiplication is performed: 13 × 7 = 91

Finally, addition and subtraction are performed: 214 + 91 - 21 = 284

Explanation

The difference between the second number and the first number in the other pairs is 17. For the pair 57- 67, the difference is 10 (67 - 57 = 10). Thus, this pair does not follow the common pattern of having a difference of 17 and does not belong to the group.

Explanation

To analyze the conclusions, we can evaluate the logical relations between the statements:

For Conclusion I: The statement "Some Shoes are Boxes" indicates an intersection between Shoes and Boxes. Since "All Boxes are Houses", the entire set of Boxes is contained within Houses. This means the intersection of Shoes and Boxes must also lie within the set of Houses. Therefore, some Houses are Shoes, which makes Conclusion I logically follow.

For Conclusion II: The statement "All Shoes are Feet" means the set of Shoes is entirely contained within the set of Feet. Since "Some Shoes are Boxes", there is an overlapping region between Shoes and Boxes. Because all Shoes are Feet, this overlapping region of Shoes and Boxes must also be a part of Feet. Therefore, some Feet are Boxes, which makes Conclusion II logically follow.

Explanation

By comparing the words DRAWN and WARNE, the common letters are W, A, and R.

Comparing their respective codes 25781 and 57264, the common digits are 2, 5, and 7. This means the letters W, A, and R correspond to the digits 2, 5, and 7 in some order.

The remaining letters in WARNE are N and E, which must correspond to the remaining digits 6 and 4. Since 6 is not among the given options, the code for E is 4.

Explanation

By interchanging the mathematical operators × and ÷, and + and -, the given equation is rewritten as:

42 ÷ 7 × 12 + 77 - 13

Applying the BODMAS rule:

First, perform the division operation: 42 ÷ 7 = 6

Next, perform the multiplication operation: 6 × 12 = 72

Next, perform the addition operation: 72 + 77 = 149

Finally, perform the subtraction operation: 149 - 13 = 136

Explanation

The standard relation for the given number-pairs is y = x² + 9, where x is the first number and y is the second number.

Substituting x = 15 into this formula: 15² + 9 = 225 + 9 = 234

Since 234 is not equal to 244, the pair 15:244 does not satisfy this relationship, making it the odd one out.

Explanation

The given series is 16, 19, 25, 34, 46, ... Calculating the differences between consecutive terms: 19 - 16 = 3 25 - 19 = 6 34 - 25 = 9 46 - 34 = 12

The differences form an arithmetic progression of multiples of 3: 3, 6, 9, 12, ... Following this pattern, the next difference in the sequence must be 15. Adding this difference to the last term gives: 46 + 15 = 61

Explanation

To find the day of the week on 4 December 1925 starting from Sunday, 11 August 1918, we calculate the total number of odd days between the two dates.

First, calculate the odd days from 11 August 1918 to 11 August 1925: The difference is 7 years (1925 - 1918). Among these, there are 2 leap years (1920 and 1924) and 5 ordinary years. Total odd days from years = (5 × 1) + (2 × 2) = 9 odd days. Reducing mod 7 gives 9 mod 7 = 2 odd days.

Next, calculate the odd days from 11 August 1925 to 4 December 1925: Remaining days in August = 20 days (31 - 11) September = 30 days October = 31 days November = 30 days December = 4 days Total days = 20 + 30 + 31 + 30 + 4 = 115 days. Reducing mod 7 gives 115 mod 7 = 3 odd days.

Total odd days = 2 + 3 = 5 odd days.

Adding 5 days to Sunday results in Friday.

Explanation

We decode the given expression step-by-step:

Z ÷ Y indicates that Z is the daughter of Y.

Y + S indicates that Y is the father of S. This means Z and S are siblings, sharing Y as their father.

S × V indicates that S is the son of V. Since Y is already established as the father of S, V must be the mother of S, making Y and V husband and wife.

Since Z is the daughter of Y, and V is the wife of Y, Z is the daughter of V.

Explanation

The letter-cluster TVX has alphabetical positions of T = 20, V = 22, and X = 24. The difference between consecutive letters in this cluster is +2 and +2. This does not follow the +2, +1 pattern shared by the other letter-clusters, where the first interval is 2 and the second interval is 1.

Explanation

The relationship between the first and second number in each pair is defined by dividing the first number by 3 to obtain the second number.

75 ÷ 3 = 25 69 ÷ 3 = 23

Applying this same mathematical relationship to 93: 93 ÷ 3 = 31

Explanation

Substituting the letters from the correct option into the blanks of the series D_D_E_D_D_E_ completes the pattern.

Inserting the letters E, D, D, E, D, D sequentially into the six blanks yields: D E D D E D D E D D E D

This completed sequence consists of the three-letter unit D E D repeated continuously four times: D E D | D E D | D E D | D E D

This establishes a consistent and logically complete pattern.

Explanation

The relationship between the letter groups is established by shifting each letter forward by 8 positions in the English alphabetical order.

For the first pair, DFCB to LNKJ: D (4) + 8 = L (12) F (6) + 8 = N (14) C (3) + 8 = K (11) B (2) + 8 = J (10)

For the second pair, OQNM to WYVU: O (15) + 8 = W (23) Q (17) + 8 = Y (25) N (14) + 8 = V (22) M (13) + 8 = U (21)

Applying this same rule to JLIH: J (10) + 8 = R (18) L (12) + 8 = T (20) I (9) + 8 = Q (17) H (8) + 8 = P (16)

This gives the sequence RTQP.

Explanation

The given series follows a distinct logical pattern for the first letters, second letters, and numbers of each term.

For the first letter of each term, the alphabetical positions increase by 3 at each step: Q (17) + 3 = T (20) T (20) + 3 = W (23) W (23) + 3 = Z (26) Z (26) + 3 = C (3, after resetting at Z)

For the second letter of each term, the alphabetical positions also increase by 3 at each step: X (24) + 3 = A (1, after resetting at Z) A (1) + 3 = D (4) D (4) + 3 = G (7) G (7) + 3 = J (10)

For the numbers, the pattern alternates between subtracting 4 and multiplying by 5: 10 - 4 = 6 6 × 5 = 30 30 - 4 = 26 26 × 5 = 130

Combining these three patterns, the missing term is TA 6.

Explanation

The given series follows a pattern where the difference between consecutive terms decreases by 2, representing consecutive decreasing odd numbers starting from 21.

738 - 717 = 21 757 - 738 = 19

Following this pattern, the next difference should be 17: 757 + 17 = 774

To verify, the next difference should be 15: 774 + 15 = 789

This confirms that the missing number is 774.

Explanation

The relationship between the three numbers in each triad follows the formula:

Second number = First number × Third number × 10

Applying this relation to the given triads: 4 × 5 × 10 = 200 6 × 7 × 10 = 420

Applying the same relation to the numbers in option C: 8 × 9 × 10 = 720

Explanation

In the expression Y % P + K @ R S Z, the relationships are decoded from left to right as follows:

Y % P means Y is the mother of P. P + K means P is the sister of K, which means Y is also the mother of K. K @ R means K is the brother of R, which means Y is also the mother of R. R S Z means R is the daughter of Z.

Since Y is the mother of R and Z is the parent of R, and since Y is female, Z must be the father of R. Therefore, Y and Z are married, making Y the wife of Z.

Explanation

The numbers in the other groups follow the mathematical relationship where the difference between the first and second number, multiplied by 5, equals the third number:

(First number - Second number) × 5 = Third number

Applying this logic: (17 - 14) × 5 = 3 × 5 = 15 (39 - 33) × 5 = 6 × 5 = 30 (22 - 18) × 5 = 4 × 5 = 20

For the group 33 - 26 - 25, this relationship does not hold: (33 - 26) × 5 = 7 × 5 = 35 ≠ 25

Explanation

The series is based on the repetition of a four-letter pattern: h i j h.

Repeating this pattern three times gives the sequence: h i j h h i j h h i j h

By placing the letters i, h, j, and i sequentially from left to right into the blanks of the series h _ j _ h i _ h h _ j h, we complete this pattern perfectly.

Explanation

Comparing the coded representations of the two statements: The words in Earth and Sun are coded as 2% J4 9 | . The words in Sun and Stars are coded as 9 | 6# 2%.

The common words in both statements are Sun and and, and their corresponding common codes are 2% and 9 | . Eliminating these common elements from the second statement leaves the word Stars, which must correspond to the remaining unique code 6#.

Explanation

To find the day of the week on 14 February 2003 starting from 1 September 2002, we calculate the total number of odd days between the two dates.

The number of days in each month is: September: 29 days remaining (30 - 1) October: 31 days November: 30 days December: 31 days January: 31 days February: 14 days

Total days = 29 + 31 + 30 + 31 + 31 + 14 = 166 days.

To find the number of odd days, we divide the total days by 7: 166 ÷ 7 = 23 weeks and a remainder of 5 days.

Adding 5 odd days to Sunday (Sunday + 5 days) results in Friday.

Explanation

The given sequence follows an arithmetic progression with a constant common difference of 6.

11 - 5 = 6 17 - 11 = 6

Applying this common difference of 6 to the third term: 17 + 6 = 23

We can verify this value with the subsequent terms in the series: 23 + 6 = 29 29 + 6 = 35

Explanation

The given series follows an addition pattern where the difference between consecutive terms increases by successive multiples of 9.

31 - 22 = 9 (which is 9 × 1) 49 - 31 = 18 (which is 9 × 2) 76 - 49 = 27 (which is 9 × 3) 112 - 76 = 36 (which is 9 × 4)

Following this pattern, the next difference must be the fifth multiple of 9, which is 45 (9 × 5).

Adding 45 to the last term: 112 + 45 = 157

Explanation

By converting the letters to their respective numerical positions in the English alphabet, where A = 1, B = 2, and so on, we can establish the pattern of the relationship.

In the first pair, DM 12 relates to HQ 17: The first letter shifts forward by 4 positions: D (4) + 4 = H (8) The second letter shifts forward by 4 positions: M (13) + 4 = Q (17) The number increases by 5: 12 + 5 = 17

In the second pair, TS 19 relates to XW 24: The first letter shifts forward by 4 positions: T (20) + 4 = X (24) The second letter shifts forward by 4 positions: S (19) + 4 = W (23) The number increases by 5: 19 + 5 = 24

Applying this same logic to KG 17: The first letter shifts forward by 4 positions: K (11) + 4 = O (15) The second letter shifts forward by 4 positions: G (7) + 4 = K (11) The number increases by 5: 17 + 5 = 22

This results in the term OK 22.

Explanation

The series follows a specific pattern for each letter position:

First letter: Decreases by 2 in each step Z (26) → X (24) → V (22) → T (20) → R (18)

Second letter: Increases by 2 in each step A (1) → C (3) → E (5) → G (7) → I (9)

Third letter: Decreases by 2 in each step M (13) → K (11) → I (9, in VEI) → G (7) → E (5)

Combining these, the next term in the series is RIE.

Explanation

In the decoded relation:

L - M indicates that L is the brother of M.

K × L indicates that K is the mother of L, which means K is the mother of M.

J ÷ K (represented as J + K) indicates J is the sister of K.

I + J indicates that I is the father of J.

Since J is the sister of K and I is the father of J, it follows that I is also the father of K. As K is the mother of M, I is the mother's father of M.

Explanation

The letters of the word KINGDOM are K, I, N, G, D, O, and M. Arranging these seven letters in alphabetical order gives the sequence D, G, I, K, M, N, O.

In this new letter-cluster, the letter fourth from the left is K, and the letter at the extreme right is O.

In the standard English alphabetical series, the position of K is 11 and the position of O is 15. The number of letters lying between two positions p₁ and p₂ is calculated as p₂ - p₁ - 1. Substituting the values gives 15 - 11 - 1 = 3. These three letters are L, M, and N.

Explanation

To find the code for the words, we use the sum of the individual digits of the place values of each letter in the word.

For YACHT: Y = 25 → 2 + 5 = 7 A = 1 → 1 C = 3 → 3 H = 8 → 8 T = 20 → 2 + 0 = 2 Sum of the digits = 7 + 1 + 3 + 8 + 2 = 21 Subtracting 2 (the first digit of the sum): 21 - 2 = 19, which corresponds to the letter S (19th letter).

For SHALEO: S = 19 → 1 + 9 = 10 H = 8 → 8 A = 1 → 1 L = 12 → 1 + 2 = 3 E = 5 → 5 O = 15 → 1 + 5 = 6 Sum of the digits = 10 + 8 + 1 + 3 + 5 + 6 = 33 Subtracting 9 (the product of the digits of the sum, 3 × 3 = 9): 33 - 9 = 24.

For ANALYSTIC: A = 1 → 1 N = 14 → 1 + 4 = 5 A = 1 → 1 L = 12 → 1 + 2 = 3 Y = 25 → 2 + 5 = 7 S = 19 → 1 + 9 = 10 T = 20 → 2 + 0 = 2 I = 9 → 9 C = 3 → 3 Sum of the digits = 1 + 5 + 1 + 3 + 7 + 10 + 2 + 9 + 3 = 41 Subtracting 1 (the unit digit of the sum): 41 - 1 = 40.

Explanation

The logic followed in the given pairs is that the second number is obtained by multiplying the first number by 2 and then adding 2 to the result.

Using the formula: Second Number = (First Number × 2) + 2

For the first pair: (34 × 2) + 2 = 68 + 2 = 70

For the second pair: (56 × 2) + 2 = 112 + 2 = 114

Applying the same logic to 23: (23 × 2) + 2 = 46 + 2 = 48

Explanation

The relationship between the letter-clusters is determined by the shifting of their positional values (A = 1, B = 2, ..., Z = 26):

First letter shift: D (4) + 4 = H (8) V (22) + 4 = Z (26)

Third letter shift: G (7) + 7 = N (14) M (13) + 7 = T (20)

Applying this same logic to the options: First letter: K (11) + 4 = O (15) Third letter: Y (25) + 7 = F (6, after wrapping around the alphabet)

Only the pair KTY : OBF satisfies this pattern.

Explanation

In the given number pairs, the mathematical operation used is the subtraction of the first number from the second, which yields a constant difference of 63. For the pair 25 : 86, the difference is 86 - 25 = 61, which does not equal 63.

Explanation

The relationship between the two numbers in the conforming pairs follows the pattern where the second number is the cube of the first number incremented by 1, represented as y = (x + 1)³. For pair (3), which is 2 - 8, this rule is violated because (2 + 1)³ = 3³ = 27, which does not equal 8. This makes pair (3) the odd one out.

Explanation

The series consists of three patterns running in parallel for the first letter, second letter, and the number of each term.

The first letter of each term follows the standard alphabetical order: D, E, F, G, H, incrementing by one position with each step. Thus, the missing first letter is F.

The second letter of each term also follows the standard alphabetical order: T, U, V, W, X, incrementing by one position with each step. Thus, the missing second letter is V.

The numbers in the terms form a decreasing arithmetic progression: 35, 33, 31, 29, 27, where each number is obtained by subtracting 2 from the previous one. Thus, the missing number is 33 - 2 = 31.

Combining these three patterns, the missing term is FV 31.

Explanation

Since all papers are flowers and some papers are buttons, the intersection of papers and buttons must also lie within flowers. This directly implies that some flowers are buttons, which means some buttons are flowers, validating conclusion (II).

Furthermore, because some buttons are flowers and all buttons are stamps, the buttons that are flowers must also be stamps. This guarantees that there is an intersection between flowers and stamps, validating conclusion (I). Therefore, both conclusions (I) and (II) logically follow from the given statements.