SSC CHSL Tier 1 2015 General Intelligence & Reasoning Questions with Solutions

Explanation

Each letter in the second group GHJK is obtained by adding 6 to the alphabetical position of the corresponding letter in the first group ABDE.

The alphabetical positions of ABDE are 1, 2, 4, and 5. Adding 6 to each yields 7, 8, 10, and 11, which corresponds to GHJK.

Applying this same +6 shift pattern to the third group MNPQ:

M (13) + 6 = 19 (S) N (14) + 6 = 20 (T) P (16) + 6 = 22 (V) Q (17) + 6 = 23 (W)

The resulting sequence is STVW.

Explanation

The letters in each group follow a pattern of adding 6 to the alphabetical position of each corresponding letter in the previous group.

For the first pair, ACE to GIK: A (1) + 6 = G (7) C (3) + 6 = I (9) E (5) + 6 = K (11)

Applying the same logic to MOQ: M (13) + 6 = S (19) O (15) + 6 = U (21) Q (17) + 6 = W (23)

This gives the letter group SUW.

Explanation

The logic followed in this analogy is reversing the letters of the given word. Reversing the letters of GNIDAER from right to left gives the word READING. Following the same pattern, reversing the letters of NOITULOS from right to left yields the word SOLUTION.

Explanation

In biological organization, a cell is the fundamental structural and functional unit of life. When similar cells group together to perform a specific, coordinated function, they constitute a tissue. This defines a direct part-to-whole relationship, where cells serve as the individual units that assemble to form a tissue.

Explanation

The relationship between the first pair of numbers is division by 7: 21 ÷ 7 = 3

Applying the same logic to the second number: 574 ÷ 7 = 82

Explanation

Gloves, sweater, and shawl are all items of winter clothing designed to be worn on the body to protect against cold temperatures, whereas an umbrella is an accessory used to protect against rain or sun.

Explanation

The word PORTRAIT is a noun that represents a specific product or subject of art, specifically a picture or painting of a person. The other alternatives in the group are verbs that denote the actions or techniques used to create art. This grammatical distinction makes PORTRAIT the odd one out.

Explanation

The hand is a part of the upper limb of the human body, whereas the other features are sensory organs located entirely on the human face.

Explanation

The general pattern followed by the number pairs is y = 3x + 1, where x represents the first number and y represents the second number. Applying this relationship to the other pairs yields 8 × 3 + 1 = 25, 13 × 3 + 1 = 40, and 15 × 3 + 1 = 46. The pair 6:22 does not satisfy this rule because 6 × 3 + 1 equals 19, not 22, which makes it the odd pair.

Explanation

The number 71 is a prime number because it has only two factors, which are 1 and itself. All other numbers given in the alternatives are composite numbers as they have more than two factors.

Explanation

The letter group MNOP consists of consecutive letters arranged in forward alphabetical order. In contrast, the letter groups in the other options are arranged in reverse alphabetical order.

Explanation

The number 100 is a perfect square (10²), whereas the other numbers in the group are perfect cubes, specifically 125 is 5³, 343 is 7³, and 216 is 6³.

Explanation

The positional values of the letters in VXB are V = 22, X = 24, and B = 2 (or 28 in a continuous cycle). This represents a pattern of adding 2 and then adding 4 to the alphabetical positions. This variation in differences does not conform to the consistent addition of 3 between consecutive letters that characterizes the other letter groups.

Explanation

The series is formed by combining two alternating sub-series.

The first sub-series consists of the terms at the odd-numbered positions: 6, 9, 12, ... where each term increases by 3. The next term in this sub-series is 12 + 3 = 15.

The second sub-series consists of the terms at the even-numbered positions: 2, 4, ... where each term increases by 2. The next term in this sub-series is 4 + 2 = 6.

Aligning these alternating terms gives the missing sixth term as 6 and the seventh term as 15.

Explanation

The series follows a pattern where the difference between the alphabetical positions of successive letters increases by 1 at each step.

Converting the letters to their numerical positions in the English alphabet: A = 1 D = 4 H = 8 M = 13 S = 19

Calculating the differences between consecutive terms: 4 - 1 = 3 8 - 4 = 4 13 - 8 = 5 19 - 13 = 6

Since the differences are 3, 4, 5, and 6, the next difference in the sequence must be 7. Adding 7 to the position of S gives: 19 + 7 = 26

The 26th letter of the alphabet is Z.

Explanation

The given series follows the pattern of n² - 1 for consecutive natural numbers:

1² - 1 = 0 2² - 1 = 3 3² - 1 = 8 4² - 1 = 15 5² - 1 = 24

Alternatively, the difference between consecutive terms increases by 2 each time:

0 + 3 = 3 3 + 5 = 8 8 + 7 = 15 15 + 9 = 24

Explanation

The series is divided into alternating blocks of three letters that follow forward and backward alphabetical patterns:

First block (forward): A, C, E (alphabetical positions 1, 3, 5, increasing by 2) Second block (backward): Z, X, V (positions 26, 24, 22, decreasing by 2) Third block (forward): G, I, K (positions 7, 9, 11, increasing by 2) Fourth block (backward): T, R, P (positions 20, 18, 16, decreasing by 2)

The starting letters of the forward blocks increase by 6 positions: A (1) + 6 = G (7). Following this pattern, the next block is a forward block starting with G (7) + 6 = 13, which corresponds to the letter M.

Explanation

The total number of students in a line can be determined using the standard relation:

Total = (Position from Left) + (Position from Right) - 1

Substituting the given values where Naresh is 17th from the left and 22nd from the right:

Total = 17 + 22 - 1 Total = 39 - 1 Total = 38

Subtracting 1 is necessary because Naresh is counted twice—once from the left and once from the right.

Explanation

The pattern of the given equations involves taking the product of the digits of each of the two numbers and then adding those products together.

For 72 × 19 = 23, the calculation is (7 × 2) + (1 × 9) = 14 + 9 = 23.

For 13 × 48 = 35, the calculation is (1 × 3) + (4 × 8) = 3 + 32 = 35.

For 16 × 43 = 18, the calculation is (1 × 6) + (4 × 3) = 6 + 12 = 18.

Following this pattern for 39 × 22, the calculation is (3 × 9) + (2 × 2) = 27 + 4 = 31.

Explanation

The given letter series is based on the repetition of a 6-letter palindromic pattern, abccba. Dividing the 24-character sequence into four groups of six letters each, we get:

ab_cba | bcc_a | abccb | _bccba

Placing the letters from cabaa sequentially into the five gaps completes each group:

The first gap is filled with c, forming abccba. The second gap is filled with a and the third gap is filled with b, forming abccba. The fourth gap is filled with a, forming abccba. The fifth gap is filled with a, forming abccba.

The completed series becomes a continuous repetition of the 6-letter block: abccba abccba abccba abccba.

Explanation

Each letter in the word LISTEN corresponds directly to a digit in its code 593417 based on its position: L is 5, I is 9, S is 3, T is 4, E is 1, and N is 7.

To code the word SILENT, we use the same digit substitution for each letter in its new order. Replacing S with 3, I with 9, L with 5, E with 1, N with 7, and T with 4 yields the code 395174.

Explanation

The chronological progression of computer hardware is defined by the generations of computers. First-generation computers utilized vacuum tubes as their primary switching circuits. Second-generation computers replaced vacuum tubes with smaller, faster, and more reliable transistors. Third-generation computers integrated numerous transistors onto a single silicon semiconductor substrate, creating integrated circuits. Fourth-generation computers advanced further by packing millions of electronic components onto highly dense silicon chips, leading to microprocessors. This sequence represents a clear evolutionary path from vacuum tubes, to transistors, to integrated circuits, and finally to silicon chips.

Explanation

By representing the positions of the towns on a standard Cartesian coordinate system with East-West as the x-axis (East being positive) and North-South as the y-axis (North being positive), we can determine their relative positions.

Let town B be located at the origin (0, 0).

Town A is to the west of B, so its position is (-x, 0) where x > 0.

Town C is to the south of A, which places it at (-x, -y) where y > 0.

Town E is to the north of B, placing it at (0, z) where z > 0.

Town D is to the east of E, which places it at (w, z) where w > 0.

To find the direction of C with respect to D, we find the displacement from D to C: C - D = (-x - w, -y - z)

Since both the horizontal component (-x - w) and the vertical component (-y - z) are negative, town C is located to the west and south of town D, which corresponds to the south-west direction.

Explanation

Karthik's movements form a right-angled triangle where the base is 3 km and the perpendicular height is 4 km. The straight-line distance from his starting point to his final position is represented by the hypotenuse of this triangle.

According to the Pythagoras theorem: Distance = √(Base² + Height²)

Substituting the given values: Distance = √(3² + 4²) Distance = √(9 + 16) Distance = √25 Distance = 5 km

Explanation

The relationship among the numbers in the given set (12, 24, 144) follows the pattern where the second number is twice the first number, and the third number is the square of the first number.

If the first number is x, the set is represented as (x, 2x, x²).

For the set (12, 24, 144): First number = 12 Second number = 12 × 2 = 24 Third number = 12² = 144

Applying the same pattern to the set (13, 26, 169): First number = 13 Second number = 13 × 2 = 26 Third number = 13² = 169

Explanation

The given statement indicates that continuous training is essential for employees to increase their productivity. This directly establishes that training is a necessary or essential component to achieve and enhance productivity, which makes Assumption 1 implicit.

Assumption 2 is also implicit because productivity and profitability are intrinsically linked in any organizational context. Higher employee productivity leads to greater efficiency and output, which directly supports and enhances the overall profitability of the organization. Since these two factors complement and reinforce one another, profitability and productivity are supplementary to each other.

Explanation

When a statement asserts that travelling by Metro is more convenient and economical, it naturally presupposes that the Metro services are of an acceptable standard. For a transport system to be deemed convenient, its operations, frequency, and efficiency must satisfy the needs of the commuters, meaning that the services are reasonably good. Therefore, Assumption II is implicit in the statement.

Explanation

The rank of a person from the last is calculated using the relation: Rank from the last = Total number of students - Rank from the first + 1

Substituting the given values: Rank from the last = 45 - 15 + 1 = 31

Explanation

According to the given operator substitutions, we replace the symbols as follows:

• becomes ÷ × becomes + ÷ becomes ×

Applying these changes to the given expression 64 + 8 × 32 ÷ 4, we get: 64 ÷ 8 + 32 × 4

Using the BODMAS rule, we perform the operations in the order of division, multiplication, and then addition: First, perform the division: 64 ÷ 8 = 8 Next, perform the multiplication: 32 × 4 = 128 Finally, perform the addition: 8 + 128 = 136

Explanation

According to the rules of representation where a letter is identified first by its row and then by its column, each letter of the word BRIDE is represented as follows:

The letter B is located in Matrix II at row 5 and column 5, which gives the number 55.

The letter R is located in Matrix I at row 2 and column 1, which gives the number 21.

The letter I is located in Matrix II at row 5 and column 7, which gives the number 57.

The letter D is located in Matrix II at row 8 and column 6, which gives the number 86.

The letter E is located in Matrix I at row 2 and column 2, which gives the number 22.

Combining these numbers yields the sequence 55, 21, 57, 86, 22.

Explanation

To arrange the words in alphabetical order as they appear in a dictionary, we compare them letter by letter from left to right. All four words begin with the letters Vo.

Comparing the third letter of each word: Voluntary has l. Vorsions has r. Vortex has r. Voucher has u.

Since l comes before r, and r comes before u in the alphabet, Voluntary (4) is the first word and Voucher (2) is the last word.

To determine the order between Vorsions (1) and Vortex (3), we compare their fourth letters since their first three letters (Vor) are identical. In Vorsions, the fourth letter is s, and in Vortex, the fourth letter is t. Since s comes before t in the alphabet, Vorsions (1) comes before Vortex (3).

Combining these steps gives the final alphabetical sequence: Voluntary (4), Vorsions (1), Vortex (3), Voucher (2), which corresponds to the order 4, 1, 3, 2.

Explanation

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

All five words begin with Ab. Comparing the third letters: Abiogenesis has i, which comes first alphabetically, placing 5 first. Abrasive has r, which comes next, placing 2 second. Absolute and Absorption both have s as the third letter. Comparing their fifth letters, l in Absolute comes before r in Absorption, placing 1 third and 3 fourth. Abundance has u, which comes last alphabetically, placing 4 fifth.

Explanation

A water image is a vertical reflection of the original text, meaning the top and bottom of each letter are flipped while the left-to-right order of the letters remains unchanged.

Applying these properties to COMMISSION: The horizontal order starts with C and ends with N. C and O remain C and O after a vertical flip. M flips vertically to become W (or w). I remains I. S flips vertically to resemble a 2. N flips vertically to look like an inverted N.

Following this exact transformation from left to right yields the sequence COWwI2IOI.

Explanation

Except for 28, all the numbers in the given series (15, 30, 39, and 48) are multiples of 3 and completely divisible by 3. Since 28 is not divisible by 3, it is the wrong number in the series.

Explanation

The analogy represents the relationship between an institution and the professional who is associated with its primary function. A teacher is the professional who works in a school to deliver educational services. Similarly, a banker is the professional who works in a bank to manage and deliver financial services.

Explanation

The relationship in the first pair is Action : Location. Exercise is an activity that is performed in a gym. Applying the same logic to the second pair, eating is an activity that is performed in a restaurant.

Explanation

Correct Answer: D

The relation between the first two terms is based on the shift in alphabetical positions of the letters. Using the standard alphabetical positions:

J (10) + 2 = L (12) K (11) + 2 = M (13) P (16) - 2 = N (14) O (15) - 2 = M (13)

The pattern is +2, +2, -2, -2. Applying this same pattern to PQJI:

P (16) + 2 = R (18) Q (17) + 2 = S (19) J (10) - 2 = H (8) I (9) - 2 = G (7)

This yields RSHG.

Explanation

The relationship in the analogy is based on the mathematical formula x × (x - 1), which can also be represented as x² - x.

For the first pair, substituting x = 7 gives: 7 × (7 - 1) = 7 × 6 = 42

Applying the same formula to the second pair with x = 8 gives: 8 × (8 - 1) = 8 × 7 = 56

Explanation

The numbers in the given analogy follow the pattern of x² : x³.

For the first pair: 7² = 49 7³ = 343

Applying the same logic to the second pair: 8² = 64 8³ = 512

Explanation

The relationship in this analogy is between a person and the specific type of bed designed for them.

A Fowler bed (typographically written as Flower bed) is a specialized adjustable hospital bed designed for a patient.

Similarly, a cradle is a specialized bed designed for a baby (typographically written as Bady).

Both pairs represent the user and their designated resting apparatus.

Explanation

The given letter clusters follow a specific internal pattern based on the alphabetical positions of their letters:

The first and second letters are identical. The third letter is obtained by adding 2 to the alphabetical position of the second letter. The fourth letter is obtained by adding 1 to the alphabetical position of the third letter.

Applying this rule to the given terms:

In VVXY: First and second letters are V. Third letter is X (V + 2). Fourth letter is Y (X + 1).

In RRTU: First and second letters are R. Third letter is T (R + 2). Fourth letter is U (T + 1).

In FFHI: First and second letters are F. Third letter is H (F + 2). Fourth letter is I (H + 1).

Following the exact same internal pattern, SSUV is the corresponding term: First and second letters are S. Third letter is U (S + 2). Fourth letter is V (U + 1).

Explanation

In the first pair, each letter of the first term is shifted forward by 7 positions in the alphabetical order to obtain the corresponding letter of the second term.

Q + 7 = X P + 7 = W O + 7 = V R + 7 = Y

Applying the same logic to the third term LKJM, we shift each letter forward by 7 positions:

L + 7 = S K + 7 = R J + 7 = Q M + 7 = T

Explanation

In the pair 7:77, the relationship is based on multiplying the first number by the next consecutive prime number. The prime number immediately following 7 is 11, and multiplying them gives 7 × 11 = 77.

Applying this same logic, the first number in the correct option is 11. The prime number immediately following 11 is 13. Multiplying them gives 11 × 13 = 143.

Explanation

The letter pair PN follows a decreasing alphabetical pattern where the second letter is obtained by subtracting 2 from the position of the first letter (P = 16, N = 14). All other letter pairs follow an increasing alphabetical pattern where the second letter is obtained by adding 2 to the position of the first letter.

Explanation

Nokia is a mobile handset manufacturer, while the other companies are telecommunications service providers.

Explanation

In the number 4367, the difference pattern between consecutive digits is -1, +3, and +1, since 4 - 1 = 3, 3 + 3 = 6, and 6 + 1 = 7. This deviates from the consistent pattern of -1, +2, and +1 shown by the other numbers. Consequently, the digits of 4367 (3, 4, 6, and 7) do not form a sequence of four consecutive integers.

Explanation

The pair 13:117 has a ratio of 1:9 since 13 × 9 = 117, whereas in all other pairs, the second number is exactly 8 times the first number (16 × 8 = 128, 12 × 8 = 96, and 15 × 8 = 120).

Explanation

A submarine is a marine vessel designed to operate underwater, which distinguishes it from the other vehicles that are all designed for travel through the air or outer space.

Explanation

Fuel is a consumable source of energy used to run a vehicle, whereas the other options are permanent physical parts or mechanical components of a vehicle.

Explanation

In this pair, the first number is not exactly divisible by the second number, as 54 ÷ 17 does not yield an integer, whereas in all other pairs, the first number is a multiple of and completely divisible by the second number.