RRB NTPC CBT 1 2021 General Intelligence & Reasoning Questions with Solutions

Explanation

Emu is a flightless bird, whereas all the other listed birds are capable of flight.

Explanation

Replacing the operators according to the given rules, '÷' becomes '+', '-' becomes '×', '+' becomes '÷', and '×' becomes '-'.

The expression 2 ÷ 3 - 3 + 4 x 2 transforms into: 2 + 3 × 3 ÷ 4 - 2

Applying the BODMAS rule: = 2 + 3 × (3/4) - 2 = 2 + 9/4 - 2 = 9/4

Explanation

Interchanging '-' with '÷' and '3' with '6' in the expression gives:

4 + 3 - 6 ÷ 6 × 2

Applying the BODMAS rule: First, perform division: 6 ÷ 6 = 1 Next, perform multiplication: 1 × 2 = 2 Finally, perform addition and subtraction: 4 + 3 - 2 = 5

Explanation

The servant explicitly stated that every vegetable he brought back was a green vegetable. This directly implies that the items purchased by the servant belonged exclusively to the category of green vegetables, meaning he did not buy any vegetable other than green vegetables from the market.

Explanation

The series follows the pattern n² + 1, where n represents consecutive odd numbers starting from 1:

1² + 1 = 2 3² + 1 = 10 5² + 1 = 26 7² + 1 = 50 9² + 1 = 82 11² + 1 = 122

Alternatively, the difference between consecutive terms increases by 8 each time: +8, +16, +24, +32, and +40. Adding 24 to 26 yields 50.

Explanation

The pattern subtracts 1 and adds 1 alternately to consecutive digits:

4 - 1 = 3 1 + 1 = 2 6 - 1 = 5 7 + 1 = 8 8 - 1 = 7

Applying the same (-1, +1, -1, +1, -1) sequence to 65332:

6 - 1 = 5 5 + 1 = 6 3 - 1 = 2 3 + 1 = 4 2 - 1 = 1

Combining these digits yields 56241.

Explanation

In each given letter-cluster, the fourth letter is obtained by moving one position backward from the first letter in the alphabetical series, and the third letter is obtained by moving one position backward from the second letter.

MDCL: M - 1 = L, D - 1 = C QBAP: Q - 1 = P, B - 1 = A YHGX: Y - 1 = X, H - 1 = G TFES: T - 1 = S, F - 1 = E

Similarly, XJIW follows this rule as X - 1 = W and J - 1 = I.

Explanation

A horse is a specific organism belonging to the broader category of animals. Similarly, a flea is a specific organism belonging to the category of insects.

Explanation

R is the sister of A, and P is the daughter of R. Therefore, P is the daughter of A's sister, which means P is A's sister's daughter.

Explanation

When a union leader raises a grievance about the non-receipt of salaries for three months, it inherently assumes that employees are entitled to receive their salaries on the stipulated date, making any delay a violation of expected work standards. Furthermore, highlighting that the issue remains unresolved despite several requests made to the competent authority assumes that the authority has failed to handle the matter effectively, reflecting its operational inefficiency.

Explanation

The series follows a pattern where consecutive odd numbers (+1, +3, +5, +7, +9, +11) are added to each preceding term: 3 + 1 = 4 4 + 3 = 7 7 + 5 = 12 12 + 7 = 19 19 + 9 = 28 28 + 11 = 39

Alternatively, the general term of the series is given by Tₙ = (n - 1)² + 3. For the 7th term: T₇ = (7 - 1)² + 3 = 6² + 3 = 36 + 3 = 39

Explanation

The relationship in the given pair is between an animal and its characteristic mode of movement. Just as a bull charges as its distinct style of movement, a butterfly flutters when it moves.

Explanation

Each letter in 'PQRS' is shifted backward by 8 positions in alphabetical order to form 'HIJK':

P (16) - 8 = 8 (H) Q (17) - 8 = 9 (I) R (18) - 8 = 10 (J) S (19) - 8 = 11 (K)

Applying the same logic of subtracting 8 to 'XYZA':

X (24) - 8 = 16 (P) Y (25) - 8 = 17 (Q) Z (26) - 8 = 18 (R) A (27) - 8 = 19 (S)

Explanation

In both statements, the middle term "eatable goods" is the predicate of universal affirmative (A-type) propositions. Since a universal affirmative proposition distributes only its subject term and not its predicate term, the middle term "eatable goods" is not distributed in either premise. By the rules of categorical syllogisms, no valid relation can be drawn between the subject "cars" and the predicate "geysers" when the middle term is undistributed in both premises. Consequently, neither conclusion (i) nor conclusion (ii) logically follows.

Explanation

In all other number clusters, the fourth digit is equal to the sum of the first three digits. In 2336, the sum of the first three digits is 2 + 3 + 3 = 8, which is not equal to the fourth digit 6.

Explanation

The pattern calculates the square root of each of the two given numbers to find the first two values, and then adds them together to obtain the third value.

For 36 81: √36 = 6, √81 = 9, and 6 + 9 = 15

For 64 144: √64 = 8, √144 = 12, and 8 + 12 = 20

For 49 100: √49 = 7 √100 = 10 7 + 10 = 17

Explanation

The given series follows three separate patterns for each position in the cluster:

First letter advances by 3 steps in alphabetical order: D (+3) → G (+3) → J (+3) → M.

Middle number represents the square of consecutive integers starting from 2: 2² = 4, 3² = 9, 4² = 16, and 5² = 25.

Last letter moves backward by 3 steps in alphabetical order: U (-3) → R (-3) → O (-3) → L.

Combining the elements derived from each pattern gives M25L.

Explanation

By Statement I, the category of women and the category of cows are completely mutually exclusive sets. Statement II establishes that Elif belongs to the set of women. Since Elif is a woman and no woman can be a cow, Elif is definitively not a cow. Thus, conclusion (i) logically and certainty follows from the given statements.

Explanation

Sohan is the son of Rakesh, and Sunita is Sohan's sister, which makes Rakesh the father of both Sohan and Sunita. Since Ramesh is the father of Rakesh, Ramesh is the father of Sunita's father. Therefore, Ramesh is Sunita's paternal grandfather.

Explanation

Drink and Eat are related verbs associated with ingestion rather than antonyms (words with opposite meanings), making this pair the odd one out.

Explanation

LEDs, bulbs, and tubelights are all artificial sources of light and belong to the same functional category of electrical lighting devices used for illumination. This is the only group where all three items share a consistent and direct relationship based on a common category and purpose.

Explanation

The machine rearranges words in alphabetical order from left to right, moving one word to its correct position in each step while keeping the relative order of the remaining words intact.

Given Input: to Ball on at the small Do

The alphabetical order of the words is: at, Ball, Do, on, small, the, to

In Step I, the first word in alphabetical order, 'at', moves to the first position: at to Ball on the small Do

In Step II, the second word in alphabetical order, 'Ball', moves to the second position: at Ball to on the small Do

In Step III, the third word in alphabetical order, 'Do', moves forward into position: at Ball to on Do the small

Explanation

The terms in the series follow the pattern n² - n, where n increases by 5 for each consecutive term:

5² - 5 = 20 10² - 10 = 90 15² - 15 = 210 20² - 20 = 380 25² - 25 = 600

Alternatively, each term is the product of two consecutive multiples of 5 minus 1 and 0 respectively: 4 × 5 = 20, 9 × 10 = 90, 14 × 15 = 210, 19 × 20 = 380, and 24 × 25 = 600.

Explanation

In UVFE, the opposite letter pairs whose positional values sum to 27 are formed by the 1st and 3rd letters (U = 21, F = 6) and the 2nd and 4th letters (V = 22, E = 5). This deviates from the general pattern where the 1st and 2nd letters form the first pair of opposite letters, and the 3rd and 4th letters form the second pair of opposite letters.

Explanation

A listener is an individual who experiences or consumes a song through hearing. Similarly, a viewer is an individual who experiences or consumes visual content, such as a movie, through sight. Both pairs share the exact relationship of an artistic medium and its corresponding audience or consumer.

Explanation

Each letter in the word is shifted 4 positions backward in the alphabetical series:

L - 4 = H A - 4 = W N - 4 = J G - 4 = C U - 4 = Q A - 4 = W G - 4 = C E - 4 = A

Applying the same rule to CODE gives: C - 4 = Y O - 4 = K D - 4 = Z E - 4 = A

Explanation

The six ranks from 1 (highest) to 6 (lowest) are determined step-by-step. Since T is at the lowest rank, T occupies rank 6. With two students between T and S, S occupies rank 3. Q is given at rank 4. Because Q's rank is between S and R, and S is at rank 3, R must occupy rank 5. Finally, with U immediately above P, U occupies rank 1 and P occupies rank 2, giving the full sequence U, P, S, Q, R, T.

Explanation

The given set of numbers consists of perfect squares: 19² = 361, 27² = 729, and 29² = 841. Similarly, 529 follows this exact rule as it is the perfect square of 23 (23² = 529).

Explanation

From statements (c) and (d), since some white are grey and all grey are green, the white elements that are grey are also green, establishing that some white are green. Thus, conclusion (ii) follows.

Furthermore, statement (b) states that no black is white. Since there are green elements that are white (the grey ones), these green elements can never be black. Therefore, some green are definitely not black, making conclusion (i) follow as well.

Statement (d) specifies that all grey are green, which only allows the conversion that some green are grey, so conclusion (iii) does not follow.

Explanation

Aditya's mother is Roop. Since Roop's only brother is Manjeet, Aditya's mother's brother is Manjeet. Geet and Anshuman are the children of Aditya's mother's brother, which means they are the children of Manjeet. Consequently, Manjeet is the father of Geet.

Explanation

Comparing 'cockroach is insect' ('pq mr lo') and 'insect are species' ('fl mr sn'), the common word is 'insect' and the common code is 'mr', which means 'insect' is coded as 'mr'.

Comparing 'insect are species' ('fl mr sn') and 'is cockroach species' ('lo pq fl'), the common word is 'species' and the common code is 'fl', which means 'species' is coded as 'fl'.

Combining both codes, 'species insect' is coded as 'fl mr'.

Explanation

The pattern in the series is obtained by adding consecutive terms of the form nⁿ⁻¹ for n = 1, 2, 3, 4, 5.

The differences between consecutive terms are: 118 - 117 = 1 = 1⁰ 120 - 118 = 2 = 2¹ 129 - 120 = 9 = 3² 193 - 129 = 64 = 4³

Following this pattern, the next difference to add is 5⁴ = 625.

193 + 625 = 818.

Explanation

When a doctor links prolonged sneezing and a runny nose to the possibility of allergic rhinitis, it logically assumes that these observed symptoms are characteristic indicators of allergic rhinitis. Assumption II is therefore directly implicit as the foundational link required to make such a tentative diagnosis. Assumptions about whether very few or many other diseases share these exact symptoms are neither required nor presupposed by the doctor's statement.

Explanation

The given series follows the pattern of cubes of consecutive integers starting from 5:

5³ = 125 6³ = 216 7³ = 343

Following this pattern, the next term is 8³ = 512.

Explanation

The pattern pairs adjacent letters and sums their alphabetical positional values:

For WAITER: W (23) + A (1) = 24 I (9) + T (20) = 29 E (5) + R (18) = 23 Combining the sums gives 242923.

Applying the same rule to JUMPER: J (10) + U (21) = 31 M (13) + P (16) = 29 E (5) + R (18) = 23 Combining the sums yields 312923.

Explanation

The general pattern followed by the letter-clusters is to advance the alphabetical position by +2 for the second letter and +3 for the third letter. In QSU, the positions advance by +2 (Q to S) and +2 (S to U), which follows a +2, +2 rule instead.

Explanation

By representing "is sweeter than" with the > symbol, the given conditions can be ordered as follows:

D is not as sweet as B gives B > D. A is sweeter than E but not as sweet as D gives D > A > E. B is sweeter than C gives B > C.

Combining these relationships yields B > D > A > E and B > C. Since B is sweeter than D, A, E, and C, B is the sweetest among all the chocolate cakes.

Explanation

According to the given statements, the subset of girls who are boys cannot be lazy because no boy is lazy. Therefore, those specific girls are guaranteed not to be lazy, which directly proves that some girls are not lazy (Conclusion II). Conclusion I cannot be deduced because there is no information confirming that any girls are lazy.

Explanation

The pattern divides the given word from left to right into alternating groups of 2 letters and 1 letter, and then reverses the order of these groups while maintaining the relative order of letters within each group.

For MOLECULES: Groups: MO | L | EC | U | LE | S Reversing the order of groups: S | LE | U | EC | L | MO = SLEUECLMO

Applying the same rule to TRANSDUCTION: Groups: TR | A | NS | D | UC | T | IO | N Reversing the order of groups: N | IO | T | UC | D | NS | A | TR = NIOTUCDNSATR

Explanation

Let six positions around the circle be numbered 1 to 6 in a clockwise direction. Placing Rohit at position 1, Meenu sits second to his left at position 3. Since Umesh is between Rohit and Priti, Umesh occupies position 6 and Priti occupies position 5. Sweety sits to the immediate right of Priti at position 4. By elimination, the remaining position 2, which lies directly between Rohit (position 1) and Meenu (position 3), is occupied by Kamal.

Explanation

In this pattern, the middle number represents the sum of the alphabetical positions of the flanking letters. For B20U, the positional values are B = 2 and U = 21, which add up to 2 + 21 = 23, but the given middle number is 20.

Explanation

The series consists of two patterns running simultaneously:

Numbers increase by 2: 1 + 2 = 3, 3 + 2 = 5, and 5 + 2 = 7.

Letters decrease by 2 positions in reverse alphabetical order: Z (26) − 2 = X (24), X (24) − 2 = V (22), and V (22) − 2 = T (20).

Combining both components yields 7T.

Explanation

Let the weight of article R be x.

Using the given relationships: S = 4 × R = 4x T = 3 × S = 3 × 4x = 12x Q = 2 × R = 2x P = 2 × Q = 2 × 2x = 4x

Comparing the weights of all five articles in terms of x: R = x Q = 2x P = 4x S = 4x T = 12x

Since x is positive, R has the lowest value among all five articles, making it the lightest.

Explanation

The relationship between the numbers follows a constant multiplier pattern where the second number is obtained by multiplying the first number by 37.

3 × 37 = 111

Applying the same rule to the third number:

7 × 37 = 259

Explanation

In this direct letter-to-digit coding scheme, each letter corresponds to the digit at the same position in the given code words:

From WET = 135, we get W = 1, E = 3, T = 5. From RAIN = 4678, we get R = 4, A = 6, I = 7, N = 8.

Substituting these values for the word ENTER: E = 3 N = 8 T = 5 E = 3 R = 4

Combining them gives 38534.

Explanation

Metal represents a general category or broad class of chemical elements, whereas the remaining items are specific individual chemical elements that belong to this category.

Explanation

The first letter of each pair increases by 2 positions in alphabetical order: D (4) + 2 = F (6), F (6) + 2 = H (8), and H (8) + 2 = J (10).

The second letter in each pair is the opposite letter of the first, where the sum of their numerical positions in the alphabet equals 27: D(4) + W(23) = 27, F(6) + U(21) = 27, and H(8) + S(19) = 27. Following this pattern, the opposite letter for J(10) is Q(17) since 10 + 17 = 27.

Explanation

The pattern follows a positional increment of +2, +3, and +2 for the respective letter positions in the alphabet:

C (3) + 2 = E (5) E (5) + 3 = H (8) A (1) + 2 = C (3)

Applying the same rule to JQM:

J (10) + 2 = L (12) Q (17) + 3 = T (20) M (13) + 2 = O (15)

Explanation

A soldier uses a battle tank as a primary mechanized vehicle and equipment to perform combat operations on the field. Similarly, a farmer uses a tractor as a primary mechanized vehicle and equipment to perform farming operations on the field.

Explanation

The coding pattern follows an alternating sequence of operations on the alphabetical position of each letter: -2, +1, -2, +1, -2.

Applying this pattern to ALIEN: A - 2 = Y L + 1 = M I - 2 = G E + 1 = F N - 2 = L

This gives the coded word YMGFL.