SSC CHSL Tier 1 2017 General Intelligence & Reasoning Questions with Solutions

Explanation

The series is formed by applying separate alphabetical progression patterns to each position of the letters in the three-letter terms.

For the first letter of each term, the pattern is an addition of 2 to the alphabetical position: G to I, I to K, K to M, and M + 2 positions yields O.

For the second letter of each term, the pattern is an addition of 3 to the alphabetical position: J to M, M to P, P to S, and S + 3 positions yields V.

For the third letter of each term, the pattern is a subtraction of 2 from the alphabetical position: T to R, R to P, P to N, and N - 2 positions yields L.

Combining these individual letters in order gives the next term in the sequence as OVL.

Explanation

Position of Panjab from the right end is 19. Since Raftaar is 23 places to the left of Panjab, Raftaar's position from the right end is 19 + 23 = 42. This means there are 41 buses to the right of Raftaar.

Because Raftaar is at the exact center of the row, there must be an equal number of buses on both sides of his position. Therefore, there are also exactly 41 buses to the left of Raftaar.

To find the number of buses between Raftaar and the bus standing at the leftmost end, we exclude the leftmost bus itself from the 41 buses to his left. Thus, the number of buses between Raftaar and the leftmost bus is 41 - 1 = 40.

Explanation

The word Government does not contain the letter d. Since the word Need requires the letter d, it cannot be formed using the letters of the given word.

Explanation

Each letter of the word FRIED is shifted one position backward in alphabetical order to determine the code EQHDC.

F - 1 = E R - 1 = Q I - 1 = H E - 1 = D D - 1 = C

Applying this same rule to the word RUSTY:

R - 1 = Q U - 1 = T S - 1 = R T - 1 = S Y - 1 = X

Thus, the code for RUSTY is QTRSX.

Explanation

Substituting the operators according to the given code language: '÷' becomes '+' '-' becomes '×' '+' becomes '÷' '×' becomes '-'

The original expression 19 ÷ 2 - 35 + 10 × 6 is decoded as: 19 + 2 × 35 ÷ 10 - 6

Following the BODMAS rule, perform division first: 35 ÷ 10 = 3.5

Next, perform multiplication: 2 × 3.5 = 7

The expression simplifies to: 19 + 7 - 6

Now, perform addition and subtraction from left to right: 26 - 6 = 20

Explanation

Substituting the division and subtraction signs with each other, the equation becomes:

15 × 18 ÷ 6 - 20 + 4 = 29

Applying the BODMAS rule, first perform division: 18 ÷ 6 = 3

The equation becomes: 15 × 3 - 20 + 4 = 29

Next, perform multiplication: 15 × 3 = 45

The equation becomes: 45 - 20 + 4 = 29

Finally, solve the addition and subtraction: 45 - 20 + 4 = 29 25 + 4 = 29 29 = 29

The left-hand side equals the right-hand side, making the equation correct.

Explanation

The operation @ is defined as dividing the first number by the second number and changing the sign of the result to negative.

The formula for the pattern is: a @ b = - (a ÷ b)

Applying this formula to the given examples: 40 @ 8 = - (40 ÷ 8) = -5 30 @ 3 = - (30 ÷ 3) = -10 20 @ 5 = - (20 ÷ 5) = -4

Using the same pattern to find the value of 60 @ 3: 60 @ 3 = - (60 ÷ 3) = -20

Explanation

The given sequence consists of eight-character strings where a single lowercase pair "ab" shifts its position from left to right by two places in each successive term.

In the first term (abABABAB), "ab" is at positions 1–2. In the second term (ABabABAB), "ab" is at positions 3–4. In the third term (ABABabAB), "ab" is at positions 5–6. In the fourth term (ABABABab), "ab" is at positions 7–8. In the fifth term (abABABAB), the pattern resets, and "ab" returns to positions 1–2.

Following this cyclical pattern, the sixth term must have "ab" shifted to positions 3–4, which results in the term ABabABAB.

Explanation

Let the starting point of both women be the origin (0, 0) on a standard coordinate plane, where the x-axis represents the West-East direction (East as positive, West as negative) and the y-axis represents the North-South direction (North as positive, South as negative).

For the first woman: She walks 1 km South to reach (0, -1). Facing South, turning to her right means turning West. She walks 6 km West to reach her house at (-6, -1).

For the second woman: She walks 5 km West to reach (-5, 0). She turns North and walks 4 km to reach (-5, 4). Facing North, turning to her left means turning West. She walks 1 km West to reach her house at (-6, 4).

Comparing the two locations, the x-coordinates of both houses are identical at -6, indicating they lie on the same vertical line. The vertical distance between the second house (-6, 4) and the first house (-6, -1) is calculated as 4 - (-1) = 5 km in the positive y-direction, which points North. Thus, the second woman's house is 5 km North of the first woman's house.

Explanation

According to Statement II, all diaries are contained within the set of books. According to Statement I, the set of books and the set of notebooks are completely disjoint, meaning they have no overlap. Since the set of diaries is entirely inside the set of books, and the set of books has no overlap with notebooks, the set of diaries can also have no overlap with notebooks. Therefore, no notebooks are diaries, which makes Conclusion I logically correct.

Explanation

Each term in the series is obtained by applying a specific subtraction pattern to the alphabetical positions of the letters in the preceding term.

For the first letter, the pattern decreases by 2: H (8) - 2 = F (6) F (6) - 2 = D (4) D (4) - 2 = B (2) B (2) - 2 = Z (26)

For the second letter, the pattern decreases by 3: P (16) - 3 = M (13) M (13) - 3 = J (10) J (10) - 3 = G (7) G (7) - 3 = D (4)

For the third letter, the pattern decreases by 1: A (27) - 1 = Z (26) Z (26) - 1 = Y (25) Y (25) - 1 = X (24) X (24) - 1 = W (23)

Combining these letters yields ZDW.

Explanation

The given sequence is an arithmetic progression where each succeeding term is obtained by subtracting a constant value of 6 from the preceding term.

The common difference is calculated as: 666 - 672 = -6 660 - 666 = -6 654 - 660 = -6

Following this constant subtraction pattern, the next term in the series is: 654 - 6 = 648

Explanation

In the standard pattern of the groups, the relation between the three numbers (x, y, z) is that the second number is 3 more than the first (y = x + 3), and the third number is 7 more than the second (z = y + 7), which means the third number is 10 more than the first (z = x + 10).

In the group (57, 60, 69), the first relation holds true as 60 - 57 = 3, but the second relation is violated because 69 - 60 = 9 instead of 7, and 69 - 57 = 12 instead of 10. This makes it the odd one out.

Explanation

By identifying each letter of the word UNIT using the row-first and column-second representation:

The letter U is found in Matrix II at row 8, column 5, coded as 85.

The letter N is found in Matrix II at row 6, column 7, coded as 67.

The letter I is found in Matrix I at row 1, column 3, coded as 13.

The letter T is found in Matrix II at row 5, column 7, coded as 57.

Explanation

The relationship in the given pair is that of a physical quantity and its SI unit of measurement, as Current is measured in Ampere. Similarly, Work is a physical quantity that is measured in Joule, which is its SI unit. This maintains the same analogous relationship between the physical quantity and its unit.

Explanation

The logic followed in this analogy is a simple addition of 2 to the first number to obtain the second number.

For the first pair: 14 + 2 = 16

Applying the same rule to the second pair: 22 + 2 = 24

Explanation

The relationship between the first pair of letter groups is established by shifting each letter forward by one position in alphabetical order (+1 shift).

For the first pair ART to BSU: A + 1 = B R + 1 = S T + 1 = U

Applying the same +1 shift pattern to MRV: M + 1 = N R + 1 = S V + 1 = W

This yields the letter group NSW.

Explanation

Tyre is a component or part of a vehicle, whereas the other items represent complete means of transportation or vehicles themselves.

Explanation

The relationship followed by the numbers is that the number on the right is the square of the number on the left increased by 1, represented as (n + 1)². Applying this logic to the pair 16-279, where n is 16, the expected number on the right side is (16 + 1)² = 17² = 289. Because the given value is 279 instead of 289, this pair violates the logic and is the odd one out.

Explanation

The standard pattern of the alphabetical groups in this question is a constant difference of +2 between consecutive letters in the English alphabetical series. For DFIK, the numerical positions of the letters are D = 4, F = 6, I = 9, and K = 11. The differences between successive letters are F - D = 2, I - F = 3, and K - I = 2. This deviation from the constant difference of +2 makes DFIK the odd letter group.

Explanation

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

Comparing the second letters of the given words: Jingle and Jingling have i. Journey has o. Judge and Judgement have u.

Since i comes before o, and o comes before u, the words starting with Ji come first, followed by Jo, and then Ju.

Among the Ji words, Jingle is a shorter prefix of Jingling, so Jingle comes first, followed by Jingling. This starts the sequence with 4, 3.

Next is Journey as o comes after i but before u, giving the sequence 4, 3, 1.

Finally, among the Ju words, Judge is a shorter prefix of Judgement, so Judge comes before Judgement. This completes the sequence as 4, 3, 1, 2, 5.

Explanation

The given series follows an alternating addition pattern of +2 and +3.

11 + 2 = 13 13 + 3 = 16 16 + 2 = 18 18 + 3 = 21

Following this pattern, the next term is obtained by adding 2 to the last term:

21 + 2 = 23

Explanation

The given series follows a simple alphabetical progression for each position of the letters in the terms.

For the first letter of each term, the letters progress by adding one position in alphabetical order: I, J, K, L, and the next letter is M.

For the second letter of each term, the letters progress by adding two positions in alphabetical order: M, O, Q, S, and the next letter is U.

Combining these two progressions yields the next term in the series as MU.

Explanation

When Punit and Ankit interchange their positions, Punit takes the position previously occupied by Ankit, which is 25th from the right end. At the same time, Punit's new position is given as 45th from the left end.

The total number of boys in the row is obtained by using the formula: Total = (Position of a person from the left end + Position of the same person from the right end) - 1

Using the new position of Punit: Total = (45 + 25) - 1 Total = 70 - 1 = 69

Explanation

The word "Threatened" does not contain the letter I. Since the word "Detain" contains the letter I, it cannot be formed using the letters of "Threatened".

Explanation

Comparing the first statement, book is tough, coded as fu la mi, with the second statement, tough can easy, coded as fu muk po, the only common word between them is tough. Correspondingly, the only common code between the two sets is fu. This directly shows that tough is coded as fu.

Explanation

Substituting the decoded operators into the given expression as per the rules: becomes +

• becomes × × becomes ÷ ÷ becomes -

The original expression: 2 - 12 + 10 × 5 ÷ 12

Translates to: 2 + 12 × 10 ÷ 5 - 12

Applying the BODMAS rule: First, perform the division operation: 10 ÷ 5 = 2 The expression becomes: 2 + 12 × 2 - 12

Next, perform the multiplication operation: 12 × 2 = 24 The expression becomes: 2 + 24 - 12

Finally, perform addition and subtraction: 26 - 12 = 14

Explanation

Interchanging the signs + and ÷ in the equation: 1 ÷ 14 × 30 + 20 - 10 = 12

gives the new expression: 1 + 14 × 30 ÷ 20 - 10

According to the BODMAS rule, operations are performed in the order of division, multiplication, addition, and subtraction.

First, divide 30 by 20: 30 ÷ 20 = 1.5

Next, multiply 14 by 1.5: 14 × 1.5 = 21

Substitute this back into the expression: 1 + 21 - 10

Finally, perform addition and subtraction: 22 - 10 = 12

This matches the right-hand side of the equation.

Explanation

The operation * follows the mathematical relation:

x * y = (x - y) / 2

Applying this relation to the given equations:

8 * 2 = (8 - 2) / 2 = 6 / 2 = 3

14 * 18 = (14 - 18) / 2 = -4 / 2 = -2

18 * 2 = (18 - 2) / 2 = 16 / 2 = 8

Using the same formula for the required expression:

14 * 10 = (14 - 10) / 2 = 4 / 2 = 2

Explanation

Each term in the given list contains seven letters, consisting of uppercase X and lowercase x. The position of the lowercase letter x shifts one place to the right in each successive term. In the first term, x is in the second position. It moves to the third position in the second term, the fourth position in the third term, the fifth position in the fourth term, and the sixth position in the fifth term. Continuing this pattern, the next term must have the lowercase letter x in the seventh position, which results in XXXXXXx.

Explanation

By tracking the movement of the auto-rickshaw on a Cartesian coordinate system with the starting position at (0, 0):

First, the auto travels 6.5 km North, reaching the point (0, 6.5). Next, turning left from North means heading West, so traveling 1.5 km West brings it to (-1.5, 6.5). Then, turning South and traveling 2.5 km moves it to (-1.5, 4.0) since 6.5 - 2.5 = 4.0. Finally, turning left from South means heading East, so traveling 1.5 km East brings the auto to (0, 4.0) since -1.5 + 1.5 = 0.

Comparing the final position (0, 4.0) to the starting position (0, 0), the auto-rickshaw is 4 km North of its starting point.

Explanation

By Statement II, all wheels are contained within the category of bikes. By Statement I, the category of bikes has no intersection with the category of two-wheelers. Since all wheels are a subset of bikes, and bikes are completely disjoint from two-wheelers, it logically follows that wheels and two-wheelers must also be completely disjoint. Therefore, no two-wheelers are wheels, which makes Conclusion I logically true.

Explanation

The series is formed by incrementing each letter of the three-letter terms by one position in alphabetical order.

First letter of each term: L, M, N, O, followed by P. Second letter of each term: O, P, Q, R, followed by S. Third letter of each term: P, Q, R, S, followed by T.

Combining these letters yields PST.

Explanation

The given series follows an arithmetic progression with a constant common difference of 2 between consecutive terms.

10 + 2 = 12 12 + 2 = 14 14 + 2 = 16 16 + 2 = 18

Applying the same rule to find the missing term: 18 + 2 = 20

Explanation

The group (4, 6, 8) consists of consecutive even integers where the numbers have a common difference of 2. The relation between the numbers follows the pattern (n, n + 2, n + 4). This differs from the other groups, which consist of three consecutive integers following the pattern (n, n + 1, n + 2) with a common difference of 1.

Explanation

In this coding system, each letter is represented first by its row number and then by its column number. To find the correct set of codes for the word BURN, we verify the codes given in option C:

For 10, we look at Matrix I at row 1 and column 0, which corresponds to the letter B.

For 98, we look at Matrix II at row 9 and column 8, which corresponds to the letter U.

For 79, we look at Matrix II at row 7 and column 9, which corresponds to the letter R.

For 95, we look at Matrix II at row 9 and column 5, which corresponds to the letter N.

Combining these letters yields the word BURN.

Explanation

The relationship in the given word pair is part-to-whole, where the first word is a constituent part of the second word. A room is a part of a house. Similarly, a needle is a constituent part of a clock, matching the exact same relationship and order of part to whole.

Explanation

The relation in this analogy follows the simple mathematical pattern where a constant value of 3 is added to the first number to obtain the second number.

In the first pair: 59 + 3 = 62

Applying the same logic to the second pair: 66 + 3 = 69

Explanation

The relationship between the first letter pair is established by shifting each letter forward by four positions in alphabetical order.

For the first group, HFZ to LJD: H is the 8th letter, and adding 4 gives 12, which is L. F is the 6th letter, and adding 4 gives 10, which is J. Z is the 26th letter, and adding 4 (wrapping around the alphabet) gives 4, which is D.

Applying the same pattern of adding 4 to each letter in KTM: K is the 11th letter, and adding 4 gives 15, which is O. T is the 20th letter, and adding 4 gives 24, which is X. M is the 13th letter, and adding 4 gives 17, which is Q.

This results in the matching pair OXQ.

Explanation

In the pair Son - Friend, one term represents a family relation while the other represents a social relation outside the family. This makes it distinct because it does not consist of two blood or familial relations.

Explanation

The general rule of the pairs is that the second number is the square of the first number. For the pair 45-2525, the square of 45 is 2025 (45² = 2025), which is not equal to 2525. Thus, this pair does not satisfy the given relation and is the odd one out.

Explanation

The positional values of the letters in RUY are R = 18, U = 21, and Y = 25. The difference between the successive letters in this group is +3 (R to U) and +4 (U to Y). This non-uniform difference deviates from the constant +3 difference found in the other groups, making this group the odd one out.

Explanation

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

All five words begin with the prefix So.

Looking at the third letters, we have l in Solution and Solve, m in Somber and Sometimes, and n in Sonorous. Alphabetically, l comes before m, and m comes before n.

Among the words starting with Sol, compare the fourth letters, which are u in Solution and v in Solve. Since u comes before v, Solution (4) precedes Solve (5).

Among the words starting with Som, compare the fourth letters, which are b in Somber and e in Sometimes. Since b comes before e, Somber (3) precedes Sometimes (2).

The word starting with Son, which is Sonorous (1), comes last.

Combining these arrangements gives the final sequence of 4, 5, 3, 2, 1.

Explanation

The terms in the given series are decreasing by a factor of 3. Each successive term is calculated by dividing the previous term by 3. Specifically, 2187 ÷ 3 = 729, 729 ÷ 3 = 243, 243 ÷ 3 = 81, and 81 ÷ 3 = 27. Following this division pattern, the next term is 27 ÷ 3 = 9. Alternatively, the series represents decreasing powers of 3 starting from 3⁷, which are 3⁷, 3⁶, 3⁵, 3⁴, and 3³. The missing term is 3², which equals 9.

Explanation

The series follows a specific addition pattern for each corresponding letter in the terms.

For the first letter of each term, the alphabetical positions increase by consecutive integers starting from 3: B (2) + 3 = E (5) E (5) + 4 = I (9) I (9) + 5 = N (14) N (14) + 6 = T (20)

For the second letter of each term, the positions increase by consecutive integers starting from 2: K (11) + 2 = M (13) M (13) + 3 = P (16) P (16) + 4 = T (20) T (20) + 5 = Y (25)

For the third letter of each term, the positions increase by consecutive integers starting from 1: P (16) + 1 = Q (17) Q (17) + 2 = S (19) S (19) + 3 = V (22) V (22) + 4 = Z (26)

Combining these letters gives the next term in the sequence as TYZ.

Explanation

Ashok is at the 17th position from the left end. Bharat is 19 places to the right of Ashok, which means Bharat is at the position: 17 + 19 = 36th from the left end.

Since Bharat is at the exact centre of the row, there are equal numbers of trucks on both sides of him. With Bharat at the 36th position, there are 35 trucks to his left and consequently 35 trucks to his right.

The total number of trucks in the row is: 35 + 1 + 35 = 71 trucks.

To find the number of trucks to the right of Ashok, we subtract Ashok's position from the total number of trucks: 71 - 17 = 54.

Explanation

The word Actually contains the letters L and Y, which are completely absent in the base word Accounting. Therefore, it is impossible to form Actually using the letters of Accounting.

Explanation

The coding pattern used here involves shifting each letter of the original word one step forward in the alphabetical sequence, which is a +1 shift.

By applying this pattern to the word MAYOR, we get M + 1 = N, A + 1 = B, Y + 1 = Z, O + 1 = P, and R + 1 = S, which forms the code NBZPS.

Using the exact same logic for the word PLAYER, we shift each letter forward by one position: P + 1 = Q, L + 1 = M, A + 1 = B, Y + 1 = Z, E + 1 = F, and R + 1 = S. Combining these letters yields the code QMBZFS.

Explanation

According to the rules of the code language, the standard mathematical operators are substituted as follows:

• becomes - × becomes + ÷ becomes × becomes ÷

Substituting these symbols into the given expression: 5 + 10 × 21 ÷ 5 - 15

The decoded expression is: 5 - 10 + 21 × 5 ÷ 15

Applying the BODMAS order of operations, we solve the multiplication and division first: 21 × 5 ÷ 15 = 21 × 1/3 = 7

Now, solving the remaining addition and subtraction: 5 - 10 + 7 = 12 - 10 = 2

Explanation

By interchanging the signs × and - in the given equation, we get: 10 - 4 + 5 × 30 ÷ 6 = 31

Applying the BODMAS rule to solve the left-hand side of the equation:

First, perform division: 30 ÷ 6 = 5

The equation becomes: 10 - 4 + 5 × 5 = 31

Next, perform multiplication: 5 × 5 = 25

The equation becomes: 10 - 4 + 25 = 31

Finally, perform addition and subtraction: 6 + 25 = 31 31 = 31

This satisfies the equation, making it correct.