SSC CHSL Tier 1 2010 General Intelligence & Reasoning Questions with Solutions

Explanation

A boat is a water transport vehicle, unlike the other vehicles which are used for land transport.

Explanation

Plastic is a synthetic or semi-synthetic organic polymer that is a non-metal and acts as an electrical and thermal insulator. It does not possess a metallic structure, luster, or high electrical conductivity.

Explanation

In the given letter groups, the numerical position of each successive letter in the English alphabet is obtained by multiplying the position of the preceding letter by 2.

For EJU, the alphabetical positions are E = 5 and J = 10 (which is 5 × 2). Multiplying the position of J by 2 gives 10 × 2 = 20, which corresponds to the letter T. Since the third letter in this group is U (the 21st letter) instead of T, EJU does not conform to the pattern followed by the other groups and is the odd one out.

Explanation

The general pattern of the letter groups is that the second letter is one step backward from the first, the third letter is one step forward from the second, and the fourth letter is one step forward from the third, representing a transition sequence of -1, +1, and +1. In UTUW, the transition from the third letter (U) to the fourth letter (W) is two steps forward (+2) instead of one step forward (+1), which would have been V to form UTUV. Because it deviates from this consistent pattern, UTUW is the odd group.

Explanation

In the group of letters ADIPY, the numerical positions of the letters in the English alphabet correspond to the perfect squares of the first five consecutive natural numbers:

A = 1 = 1² D = 4 = 2² I = 9 = 3² P = 16 = 4² Y = 25 = 5²

This perfect square progression distinguishes it from the rest.

Explanation

The given letter series consists of 16 characters. By placing the letters from the correct option sequentially into the four gaps, the series becomes bcaabcaabcaabcaa.

This reveals a repeating pattern of the four-letter group bcaa, which repeats exactly four times as bcaa bcaa bcaa bcaa. Therefore, the letters a, c, a, b successfully complete the pattern.

Explanation

The series follows a pattern where each letter in a term is shifted forward by 7 positions in the alphabet to obtain the corresponding letter of the next term.

For the first letter of each term: B (2) + 7 = I (9) I (9) + 7 = P (16) P (16) + 7 = W (23)

For the second letter of each term: D (4) + 7 = K (11) K (11) + 7 = R (18) R (18) + 7 = Y (25)

For the third letter of each term: F (6) + 7 = M (13) M (13) + 7 = T (20) T (20) + 7 = A (27, which wraps around to 1)

Applying this consistent addition of 7 to each letter of BDF yields the missing term IKM.

Explanation

The differences between consecutive terms in the given series form an arithmetic progression: 21 - 14 = 7 30 - 21 = 9 41 - 30 = 11 54 - 41 = 13

The consecutive differences are increasing by 2. Following this pattern, the next difference must be 13 + 2 = 15. Adding this difference to the last term yields the next number in the series: 54 + 15 = 69

Explanation

The series follows an alternating pattern of subtracting 3 and adding 1.

Subtracting 3 from 17 gives 14. Adding 1 to 14 gives 15. Subtracting 3 from 15 gives 12. Adding 1 to 12 gives 13.

Continuing this pattern, the next step is to subtract 3 from 13, which gives 10. The following step is to add 1 to 10, which gives 11.

Alternatively, this series can be analyzed as two alternating sub-series. The numbers at the odd positions are 17, 15, and 13, which decrease by 2. The next number in this sub-series would be 11. The numbers at the even positions are 14 and 12, which also decrease by 2, making the next number in this sub-series 10. Putting them in order gives the next two terms as 10 and 11.

Explanation

The given series follows the mathematical pattern of n² + 1, where n represents consecutive positive integers starting from 1.

Evaluating the formula for successive values of n: For n = 1: 1² + 1 = 2 For n = 2: 2² + 1 = 5 For n = 3: 3² + 1 = 10 For n = 4: 4² + 1 = 17 For n = 5: 5² + 1 = 26

Alternatively, the difference between consecutive terms increases by consecutive odd numbers: 5 - 2 = 3 10 - 5 = 5 17 - 10 = 7 26 - 17 = 9

Explanation

The series follows a pattern where the difference between consecutive letters increases by 1 at each step.

The positions of the given letters in the English alphabet are: A = 1 C = 3 F = 6 J = 10 O = 15

The differences between successive letters are: C - A = 3 - 1 = +2 F - C = 6 - 3 = +3 J - F = 10 - 6 = +4 O - J = 15 - 10 = +5

Following this pattern, the next difference must be +6: 15 + 6 = 21

The 21st letter of the alphabet is U.

Continuing the pattern to the final term, the next difference is +7: 21 + 7 = 28 In the cyclical alphabet of 26 letters, the 28th position is 28 - 26 = 2, which corresponds to the letter B. This confirms the sequence is correct.

Explanation

The relationship in the given set (10, 12, 15) is determined by the differences between consecutive terms: 12 - 10 = 2 15 - 12 = 3

This shows a pattern where the difference between the first and second term is 2, and the difference between the second and third term is 3.

Applying this same relationship to the set (68, 70, 73): 70 - 68 = 2 73 - 70 = 3

Both sets follow the exact same consecutive addition pattern of +2 and +3.

Explanation

M and F are married to each other. A and B are sisters, and since A is the sister of F, B is also a sister of F. The sister of a person's spouse is defined as their sister-in-law, which makes B the sister-in-law of M.

Explanation

The total number of boys in the row is 16. After shifting two places towards the left, Prakash becomes 7th from the left end. This means his original position from the left end was 9th.

The relationship between the position of a person from both ends of a row is given by the formula: Position from Right = Total - Position from Left + 1

Substituting the values: Position from Right = 16 - 9 + 1 = 8

Explanation

If the day before yesterday was Wednesday, then yesterday was Thursday, making today Friday. Since today is Friday, tomorrow will be Saturday, and the day after tomorrow will be Sunday.

Explanation

Let the present age of the father be F years and that of the son be S years.

From the first condition, the sum of their present ages is 70 years: F + S = 70

After 10 years, the father's age will be F + 10 and the son's age will be S + 10. According to the second condition, the son's age after 10 years will be half of the father's age: S + 10 = ½(F + 10)

Multiplying the equation by 2 gives: 2S + 20 = F + 10 F - 2S = 10

We now have a system of two linear equations: F + S = 70 F - 2S = 10

Subtracting the second equation from the first: 3S = 60 S = 20

Substituting S = 20 into the first equation: F + 20 = 70 F = 50

The present age of the father is 50 years and that of the son is 20 years.

Explanation

Each letter in the alphabet is assigned a numerical value corresponding to its position: A = 1, B = 2, C = 3, up to Z = 26.

Using this positional system for the word MAT: M = 13 A = 1 T = 20 Summing these values gives: 13 + 1 + 20 = 34

Applying the same logic to the word JOGLEX: J = 10 O = 15 G = 7 L = 12 E = 5 X = 24

Summing these values gives: 10 + 15 + 7 + 12 + 5 + 24 = 73

Explanation

By mapping each letter of the word HONESTY to its corresponding letter in the code ABCXZDQ, we establish a direct substitution cipher: H corresponds to A O corresponds to B N corresponds to C E corresponds to X S corresponds to Z T corresponds to D Y corresponds to Q

Applying this exact mapping to the letters in the word TONY, we get: T becomes D O becomes B N becomes C Y becomes Q

Combining these substituted letters in order yields the code DBCQ.

Explanation

Sanmitra begins by walking North. His subsequent turns are as follows:

First, he turns right from North, which makes him face East.

Second, he turns right from East, which makes him face South.

Third, he turns right from South, which makes him face West.

Fourth, he turns right from West, which makes him face North.

Since his last movement of 2 km is after this fourth turn, he is facing North.

Explanation

By tracking Rama's path, we can map his movements on a coordinate plane starting from the origin (0, 0) facing North:

First, he walks 10 km North, reaching the point (0, 10). Next, he turns left (West) and walks 15 km, reaching the point (-15, 10). Finally, he turns left (South) and walks 10 km, reaching the point (-15, 0).

The starting point is (0, 0) and the final point is (-15, 0). The distance between these two points is 15 km. This movement forms three sides of a rectangle where the opposite sides are equal (10 km and 15 km), placing him exactly 15 km away from his starting position.

Explanation

A solid cube of 27 small cubes is structured as a 3 × 3 × 3 grid. In such a cube, the only small cubes with exactly two painted faces are the middle cubes of the 12 edges.

The three pairs of opposite faces are painted red, yellow, and white. For a small cube to have the colors yellow and white alone, it must lie on an edge formed by the intersection of a yellow face and a white face. It cannot be a corner cube, because corner cubes touch three faces and would also have red paint.

The yellow faces are opposite to each other, and the white faces are opposite to each other. This configuration creates exactly 4 edges where a yellow face meets a white face. Since each edge of a 3 × 3 × 3 cube contains exactly 1 middle cube, there are 4 × 1 = 4 small cubes that have yellow and white paint alone.

Explanation

The positions of the five birds can be mapped based on the given directions. The Pigeon is to the right of the Parrot, which means the Parrot is to the left and the Pigeon is to its right. The Crow is next to the Pigeon, positioning it to the right of the Pigeon to form a horizontal line containing Parrot, Pigeon, and Crow. The Sparrow is located directly above the Pigeon, and the Crane is located directly below the Crow. Looking at this layout, the Pigeon sits at the intersection of the horizontal and vertical placements, making it the central bird in the group.

Explanation

Let M and S be the present ages of the mother and the son, respectively.

From the first condition, two years ago, the mother's age was four times her son's age: M - 2 = 4 × (S - 2) M - 2 = 4S - 8 M = 4S - 6

From the second condition, six years from now, the mother's age will be 10 years more than double her son's age: M + 6 = 2 × (S + 6) + 10 M + 6 = 2S + 12 + 10 M + 6 = 2S + 22 M = 2S + 16

Equating both expressions for M: 4S - 6 = 2S + 16 2S = 22 S = 11

Using the value of S to find M: M = 4 × 11 - 6 M = 38

The ratio of their present ages M:S is 38:11.

Explanation

The word SOCIALISATION does not contain the letter U. Since the word SCOUT requires the letter U, it cannot be formed using the letters of the given word.

Explanation

The word ADMINISTRATOR does not contain the letter E. Since the word NEST requires the letter E, it cannot be formed using the letters of the given word.

Explanation

The word MOTION can be formed using the letters of the word INFORMATION because all of its constituent letters (M, O, T, I, O, N) are present in the source word. Specifically, INFORMATION contains one M, two Os, one T, two Is, and two Ns, which is more than sufficient to spell MOTION.

Explanation

The statement highlights the growing popularity of Ayurvedic medicines in the West as evidence of India's glorious past. It does not provide any information regarding the popularity of Ayurvedic medicines within India, meaning conclusion I cannot be deduced. Furthermore, the statement does not mention Allopathic medicines at all, so conclusion II also does not follow. Thus, neither of the conclusions can be logically drawn from the given statement.

Explanation

The second statement states that all dogs bite. Since this property applies to the entire set of dogs, any subset of dogs must also possess the property of biting. The group of dogs who do not bark is a subset of the set of all dogs. Therefore, those dogs who do not bark must also bite, making conclusion I logically follow.

Explanation

Replacing the symbols in the sequence 8, 8, 1, 11, 11 with the mathematical signs from option D in sequential order yields:

8 - 8 + 1 = 11 ÷ 11

Solving the Left Hand Side: 8 - 8 + 1 = 0 + 1 = 1

Solving the Right Hand Side: 11 ÷ 11 = 1

Since both sides are equal to 1, the equation is balanced.

Explanation

The pattern in the given equations is: n × 10 = 9 × n

For the first equation, where n = 1: 1 × 10 = 9 × 1 = 9

For the second equation, where n = 2: 2 × 10 = 9 × 2 = 18

For the third equation, where n = 3: 3 × 10 = 9 × 3 = 27

Following this established pattern for n = 8: 8 × 10 = 9 × 8 = 72

Explanation

According to the given conditions, the mathematical symbols are substituted as follows: '-' stands for multiplication (×) '+' stands for division (÷) '×' stands for addition (+) '÷' stands for subtraction (-)

Substituting these signs into the left-hand side of the equation in option A: 36 - 6 + 3 × 5 ÷ 3

Applying the substitutions gives: 36 × 6 ÷ 3 + 5 - 3

Following the BODMAS rule, we perform division first: 6 ÷ 3 = 2

Then we perform multiplication: 36 × 2 = 72

Lastly, we perform addition and subtraction: 72 + 5 - 3 = 74

The result matches the right-hand side of the equation.

Explanation

In each column of the matrix, the number in the fourth row is obtained by multiplying the numbers in the first three rows.

For the first column: 5 × 2 × 6 = 60

For the second column: 8 × 4 × 2 = 64

Applying the same pattern to the third column: 7 × 6 × 3 = 126

Explanation

The word PENS is represented using the row and column numbers of its constituent letters from the two matrices.

For P, locating it in Matrix I shows that it lies at the intersection of row 4 and column 3, represented as 43.

For E, locating it in Matrix II shows that it lies at the intersection of row 5 and column 6, represented as 56.

For N, locating it in Matrix I shows that it lies at the intersection of row 2 and column 1, represented as 21.

For S, locating it in Matrix I shows that it lies at the intersection of row 4 and column 2, represented as 42.

Combining these codes in sequence, we get 43, 56, 21, 42.