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

Explanation

In the morning, the sun rises in the East, so Vidhyanshu initially walked facing East. Turning right from East changed his direction to South. Turning right once more from South directed his movement toward the West.

Explanation

The numbers 169, 289, and 144 are perfect squares of integers (13², 17², and 12² respectively), whereas 356 is not a perfect square.

Explanation

The relationship in the first pair follows the pattern of "profession : primary action performed". A mason performs the action of building structures. Similarly, a mechanic performs the action of repairing machinery and vehicles.

Explanation

In the letter-pair WC, the second letter is obtained by adding 6 to the alphabetical position of the first letter (W = 23, 23 + 6 = 29, which corresponds to C in cyclic alphabetical order). In the remaining letter-pairs, the second letter is obtained by shifting forward by 5 positions in the English alphabetical series.

Explanation

The coding scheme adds the alphabetical positions of each letter (A = 1, B = 2, ..., Z = 26).

A = 1 AIR = 1 + 9 + 18 = 28

For AIRCRAFT, adding the positional values gives: A (1) + I (9) + R (18) + C (3) + R (18) + A (1) + F (6) + T (20) = 76

Explanation

The coding follows an alternating pattern of adding +2 and +4 to the alphabetical position of each letter:

F (+2) = H E (+4) = I A (+2) = C T (+4) = X U (+2) = W R (+4) = V E (+2) = G

Applying the same pattern to ALMOST: A (+2) = C L (+4) = P M (+2) = O O (+4) = S S (+2) = U T (+4) = X

Explanation

Joining a gym involves engaging in regular physical exercise and workout routines, which directly improves physical health, body composition, and overall fitness. Therefore, Philips joining a gym recently (Event A) acts as the direct and principal cause that produces the outcome of him looking significantly fitter (Event B), making Event B the natural effect of Event A.

Explanation

Pankaj is good in Economics and Accounts as given in the statement mentioning Arun, Pankaj, and Surendra. Pankaj is also good in Economics and Insurance as given in the statement mentioning Pankaj and Sumit. Combining these attributes, Pankaj is good in Insurance, Accounts, and Economics.

Explanation

The series follows an alternating pattern of subtracting 2 and multiplying by 2:

11 - 2 = 9 9 × 2 = 18 18 - 2 = 16 16 × 2 = 32

Following this sequence, the next step is subtracting 2: 32 - 2 = 30

Explanation

Interchanging the 1st and 10th letters, 2nd and 9th letters, 3rd and 8th letters, and so on, completely reverses the order of the 10-letter word ZIGZAGGING.

In any reversed 10-letter word, the 5th letter from the right end corresponds directly to the 5th letter from the left end of the original word.

Counting from left to right in the original word Z-I-G-Z-A-G-G-I-N-G: 1st letter = Z 2nd letter = I 3rd letter = G 4th letter = Z 5th letter = A

Explanation

Statement 1 highlights transparency in administrative works, while Statement 2 links this transparent work culture directly to the low rate of corruption among new recruits. Because recruitment is a key administrative function, a transparent administrative environment implies that the selection process was fair, impartial, and honest. On the other hand, the statements provide no context or information regarding the feelings or reactions of job aspirants.

Explanation

Since B is A's mother, B is female, making C (her husband) male. C and D are siblings. D and E are married, and F is E's father-in-law, which means F is the father of D and C. Since F and G are a married couple and F is male, G is the mother of C and D. As C is G's son, B (who is married to C) is G's son's wife.

Explanation

The pattern is formed by reversing the order of letters in the given word and shifting each letter forward by 2 positions in the English alphabet.

Reversing LIFE gives EFIL. Adding 2 to each letter: E + 2 = G F + 2 = H I + 2 = K L + 2 = N This yields GHKN.

Applying the same rule to PORT: Reversing PORT gives TROP. T + 2 = V R + 2 = T O + 2 = Q P + 2 = R

This yields VTQR.

Explanation

"Big" and "Large" are synonyms as they have the same meaning, whereas all the other options consist of pairs of antonyms with opposite meanings.

Explanation

C is Q's mother because Q is the daughter of C. Since C is the sister of B, B is C's brother. Therefore, B is Q's mother's brother.

Explanation

The relationship in the given pair follows the pattern of 'Specific Instance : Category', where Zero is a specific example of a Number. Similarly, Jupiter is a specific instance that belongs to the category of a Planet.

Explanation

From the given statements, the picks that are locks can never be rocks since no locks are rocks. For the remaining picks, no definite relationship with rocks is established by the premises. Thus, it cannot be claimed with certainty that some picks are rocks, and it is impossible for all picks to be rocks.

Explanation

In this coding pattern, each letter is replaced by its opposite letter in the English alphabet, where the sum of the numerical positions of the original and coded letters equals 27.

Applying this rule to INTRODUCED: I(9) → R(18), N(14) → M(13), T(20) → G(7), R(18) → I(9), O(15) → L(12), D(4) → W(23), U(21) → F(6), C(3) → X(24), E(5) → V(22), D(4) → W(23).

Similarly, for POPULATION: P(16) → K(11) O(15) → L(12) P(16) → K(11) U(21) → F(6) L(12) → O(15) A(1) → Z(26) T(20) → G(7) I(9) → R(18) O(15) → L(12) N(14) → M(13)

This gives the coded word KLKFOZGRLM.

Explanation

The coding scheme uses the reverse alphabetical position of each letter, calculated as: Reverse Position = 27 − Standard Position

For L (12th letter), code = 27 − 12 = 15 For O (15th letter), code = 27 − 15 = 12

Applying this rule to each letter of LESSON: L = 27 − 12 = 15 E = 27 − 5 = 22 S = 27 − 19 = 8 S = 27 − 19 = 8 O = 27 − 15 = 12 N = 27 − 14 = 13

Combining these values in sequence yields 1522881213.

Explanation

The given series follows three distinct patterns for each component of the terms:

The first number increases by 2: 3, 5, 7, 9, 11, 13.

The middle letter moves 2 steps backward in alphabetical order: L (12), J (10), H (8), F (6), D (4), B (2).

The last number decreases by 2: 12, 10, 8, 6, 4, 2.

Combining these three components yields 13B2.

Explanation

The pattern in the series involves multiplying each term by consecutive factors that increase by 0.5 at each step:

2 × 2 = 4 4 × 2.5 = 10 10 × 3 = 30 30 × 3.5 = 105

Continuing the pattern, the next term is obtained by multiplying 105 by 4:

105 × 4 = 420

Explanation

A cobbler works with leather as the primary raw material, just as a jeweller works with gold as the primary raw material. Placing leather and jeweller into the respective question mark positions establishes the exact same professional-to-material relationship for both pairs (Cobbler : Leather :: Jeweller : Gold).

Explanation

The symbol § represents division (÷) and @ represents addition (+).

Applying this logic to the given equations: 96 § 24 @ 12 = (96 ÷ 24) + 12 = 4 + 12 = 16 21 @ 57 § 19 = 21 + (57 ÷ 19) = 21 + 3 = 24

Using the same pattern for the target expression: 36 § 6 @ 54 = (36 ÷ 6) + 54 = 6 + 54 = 60

Explanation

From Statement 2, "Some professors are bachelors" converts to "Some bachelors are professors". Combining this with Statement 1, "All professors are heroes", follows the standard syllogism rule: Some bachelors are professors + All professors are heroes = Some bachelors are heroes. Thus, Conclusion II logically follows.

Explanation

Setting the office at coordinates (0, 0): Driving 6 km east reaches (6, 0). Driving 1 km south reaches the library at (6, -1). Turning left (east) for 2 km reaches the clinic at (8, -1). Turning left (north) for 2 km reaches the market at (8, 1). Turning right (east) for 1 km reaches the father-in-law's house at (9, 1). Turning right (south) for 5 km reaches the restaurant at (9, -4).

Starting from the restaurant at (9, -4), driving 1 km west brings P to (8, -4). Turning right (north) and driving 3 km leads to (8, -1), which is the exact location of the clinic.

Explanation

The relationship between the first pair of words, Modern and Ancient, is that they are antonyms. Following the same semantic pattern, the word opposite in meaning to Noise is Silence.

Explanation

From the given mathematical relations, the operators are decoded as: × means + (since 3 + 3 = 6) ÷ means - (since 3 - 3 = 0)

• means × (since 3 × 3 = 9)

• means ÷ (since 3 ÷ 3 = 1)

Replacing the signs in the expression 6 - 4 ÷ 8 + 1 × 3 accordingly gives: 6 × 4 - 8 ÷ 1 + 3

Applying BODMAS (order of operations): Division: 8 ÷ 1 = 8 Multiplication: 6 × 4 = 24 Addition and Subtraction: 24 - 8 + 3 = 19

Explanation

In the given pattern, the second number is equal to the square of the product of the digits of the first number. For the pair 23, 216, the product of the digits is 2 × 3 = 6, but the second number is 6³ = 216 instead of 6² = 36, making this pair different from the rest.

Explanation

Arranging the five teachers from left to right based on the given conditions:

Y is at the extreme left (1st position). U is to the right of W and left of V, giving the relative order W - U - V. V is to the left of X, extending the order to W - U - V - X.

Placing this sequence after Y gives the complete seating arrangement from left to right: Y, W, U, V, X.

The middle position (3rd from either end) is occupied by U.

Explanation

The arithmetic mean is given by the formula Mean = Σ(f × x) / Σf.

Calculating total frequency Σf: Σf = 4 + 3 + 3k + 2 + 1 = 3k + 10

Calculating Σ(f × x): Σ(f × x) = (29 × 4) + (30 × 3) + (30 + k)(3k) + (34 × 2) + (62 × 1) = 116 + 90 + 90k + 3k² + 68 + 62 = 3k² + 90k + 336

Substituting the given mean of 33 into the equation: 33 = (3k² + 90k + 336) / (3k + 10) 33(3k + 10) = 3k² + 90k + 336 99k + 330 = 3k² + 90k + 336 3k² - 9k + 6 = 0 k² - 3k + 2 = 0

For the quadratic equation k² - 3k + 2 = 0, the product of the possible values (roots) is c/a = 2/1 = 2.

Explanation

Arranging the friends in descending order of age from oldest to youngest:

Madhuri is given as the oldest among all six friends.

Gunjan is older than Kamini, establishing Gunjan > Kamini.

Anita is a few months younger than Kamini but older than Sunita, giving Kamini > Anita > Sunita.

Sunita is older than Rakhi, giving Sunita > Rakhi.

Combining these relations yields the complete order from oldest to youngest: Madhuri > Gunjan > Kamini > Anita > Sunita > Rakhi

Counting from the oldest, Kamini is in the third position.

Explanation

The series follows a specific positional pattern for each letter in the cluster:

First letter increases by 1: B (+1) → C (+1) → D (+1) → E (+1) → F Second letter decreases by 1: U (-1) → T (-1) → S (-1) → R (-1) → Q Third letter increases by 1: D (+1) → E (+1) → F (+1) → G (+1) → H Fourth letter decreases by 1: S (-1) → R (-1) → Q (-1) → P (-1) → O

Following this pattern, the missing cluster is DSFQ.

Explanation

Since all students are girls and no girl is a boy, there is no overlap between the set of students and the set of boys. Therefore, no student is a boy, which directly implies that no boy is a student, making conclusion II logically valid. Conclusion I does not follow because a universal affirmative statement (All A are B) converts only to a particular affirmative statement (Some B are A), not to a universal affirmative statement.

Explanation

The pattern followed between the letter-clusters is a sequential positional shift of +2, -2, +2, -2 applied to the alphabetical positions of the letters.

For HSJQ to JQLO: H (8) + 2 = J (10) S (19) - 2 = Q (17) J (10) + 2 = L (12) Q (17) - 2 = O (15)

Applying the same pattern to CXEV: C (3) + 2 = E (5) X (24) - 2 = V (22) E (5) + 2 = G (7) V (22) - 2 = T (20)

This results in EVGT.

Explanation

A tubewell is a man-made artificial structure constructed to extract underground water using a pipe and pump, whereas ponds, rivers, and lakes are surface water bodies.

Explanation

The river Ganga originates from the Gangotri Glacier in Uttarakhand. Similarly, the Godavari river, which is the longest river in Peninsular India, originates from Trimbakeshwar near Nashik in Maharashtra.

Explanation

The code uses direct letter-to-digit substitution derived from the given words: C = 2, U = 9, P = 5 A = 4, K = 7, E = 6

Substituting these assigned numerical values for each letter in PACK gives: P = 5 A = 4 C = 2 K = 7

Combining these digits in order gives 5427.

Explanation

The pattern splits the ten-letter word into two halves of five letters each. The first five letters are shifted forward sequentially by +1, +2, +3, +4, and +5, while the remaining five letters are shifted backward sequentially by -1, -2, -3, -4, and -5 (wrapping around the alphabet where required).

Applying this pattern to ACCESSIBLE:

First half: A + 1 = B C + 2 = E C + 3 = F E + 4 = I S + 5 = X

Second half: S - 1 = R I - 2 = G B - 3 = Y L - 4 = H E - 5 = Z

Combining the transformed letters yields BEFIXRGYHZ.

Explanation

An arrow is the projectile propelled or fired from a bow. In the same way, a bullet is the projectile propelled or fired from a gun.

Explanation

The word "Anther" cannot be formed using the letters of "Canterbury" because it contains the letter 'h', which is not present in the given word.

Explanation

The terms in the given series are squares of consecutive prime numbers starting from 13:

13² = 169 17² = 289 19² = 361 23² = 529 29² = 841

The prime number following 13 is 17, giving 17² = 289.

Explanation

Substitute the symbols according to the given rules: 'x' becomes '+' '+' becomes '÷' '-' becomes '×'

Rewriting the expression 7 × 4 + 2 - 3 with the replaced operators gives: 7 + 4 ÷ 2 × 3

Applying the BODMAS order of operations: First, perform division: 4 ÷ 2 = 2 Next, perform multiplication: 2 × 3 = 6 Finally, perform addition: 7 + 6 = 13

Explanation

A hangar is a covered structure used to park, store, and maintain airplanes. Similarly, a depot is a designated garage or facility where buses are parked, maintained, and housed when not in service.

Explanation

The given series follows an alternating pattern of adding and subtracting decreasing multiples of 11 (+66, -55, +44, -33, +22):

785 + 66 = 851 851 - 55 = 796 796 + 44 = 840 840 - 33 = 807 807 + 22 = 829

The last term should be 829 instead of 827, making 827 the incorrect number in the series.

Explanation

According to the statements, some cupboards are almirahs, meaning there exists a common overlap between cupboards and almirahs. Since no table is an almirah, none of these overlapping almirah-cupboards can be tables. Therefore, those specific cupboards that are almirahs can never be tables, which establishes that some cupboards are not tables.

Conclusion I does not follow because cupboards outside the almirah group could potentially be tables. Conclusion III does not follow because all beds are contained within tables, and no table overlaps with almirahs, meaning no bed can ever be an almirah.

Explanation

Each term in the series is obtained by multiplying half of a consecutive cube, starting with 2:

1st term = ½ × 2³ = 4 2nd term = ½ × 3³ = 13.5 3rd term = ½ × 4³ = 32 4th term = ½ × 5³ = 62.5 5th term = ½ × 6³ = 108

Explanation

P and Q are sisters, so they share the same father, R. Since S is R's mother, R is the son of S. Because P is the female child of R, P is the daughter of S's son, making her S's son's daughter.

Explanation

When an authority decides to recruit a specific number of personnel for a role, it implicitly assumes that there is adequate work or duty to assign to them. Therefore, assumption 1 is implicit. Furthermore, making a policy decision to recruit civil defence warriors reflects an underlying recognition of their significance and necessity, making assumption 2 implicit as well.

Explanation

A doctor provides professional medical advice and treatment to a patient. In the same way, a lawyer provides professional legal services and representation to a client.

Explanation

Adding the two given equations eliminates and #: (@ + - #) + (# + @ - ) = 3 + 5 2@ = 8 @ = 4

Rewriting the required expression 2@ + - # as @ + (@ + - #): 2@ + - # = 4 + 3 = 7