General Ability: General Mental Ability — Solved MCQs Solved MCQs

Correct Answer: Wall

Sand, stone and cement are building materials, while a wall is a structure built from such materials, so Wall is the odd one out.

Correct Answer: Red

Milk is white, and in the given code White is called Red, so the colour of milk is Red.

Correct Answer: Brother

Seema's mother's father-in-law is Seema's paternal grandfather, and his only grandson (Seema being a girl) is her brother.

Correct Answer: X

The letters are R, M, A, D and E, which form both DREAM and ARMED, so more than one word is possible and the answer is X.

Correct Answer: Brass

Silver, gold and nickel are pure metals, while brass is an alloy, so Brass is the odd one out.

Correct Answer: 8#@7%

The code gives S = 8, T = #, O = @, R = 7 and E = %, so STORE is 8#@7%.

Correct Answer: 38

Ali is 20th from the left, so Shamika is 25th from the left and Nikhil is 22nd from the left; Nikhil is 17th from the right, so the row has 22 + 17 - 1 = 38 children.

Correct Answer: Two

The pairs are E-I (three letters between them in both the word and the alphabet) and O-N (adjacent in both), so there are two such pairs.

Correct Answer: YITSNDE

The code takes the letters of ACQUIRE in the order 7th, 5th, 6th, 4th, 3rd, 1st, 2nd; applying the same order to DENSITY gives YITSNDE.

Correct Answer: Two

In T 8 # 1 7 F J 5 % E R @ 4 D A 2 B © Q K 3 1 • U H 6 L, the symbols @ (after R, before 4) and © (after B, before Q) qualify, so there are two.

Correct Answer: QKB

In E@%, #78 and 5EJ the second element is two places after the first and the third is one place before the first, while in QKB the second element is only one place after the first, so QKB is the odd one out.

Correct Answer: None

The vowels are E (after %, before R), A (after D, before 2) and U (after •, before H); none is both preceded by a symbol and followed by a number, so the count is None.

Correct Answer: JU5

Each group takes the next unused element from the start, then the next unused element from the end, then the next unused element from the start: T-L-8, #-6-1, 7-H-F, so the next group is J-U-5.

Correct Answer: 1

Thirteenth from the right in the 27-element arrangement is A (position 15), and seven places to its right is position 22, which is 1.

Correct Answer: North-east

South-east turning to north is a 135-degree turn, and applying the same turn to south gives north-east.

Correct Answer: 91

Each pair of teams plays once, so the number of matches is 14 x 13 / 2 = 91.

Correct Answer: 42% and 78%

The pass percentage is at least 100 - 20 - 22 - 16 = 42% and at most 100 - 22 = 78%, so it lies between 42% and 78%.

Correct Answer: 12

Treating A and B as one block gives 3! arrangements, and A and B can swap within the block, so 3! x 2 = 12 ways.

Correct Answer: PRQS, RSPQ

Age order is P, R, Q, S and richness order is R, S, P, Q, giving PRQS and RSPQ.

Correct Answer: 500 m

In two minutes at 60 km per hour the train covers 2 km, which is the tunnel length plus the train length, so the train is 2 - 1.5 = 0.5 km = 500 m long.

Correct Answer: D

The new books are D and F, the law reports are A, C and D, and D is not among the blue-covered B, C and E, so D is the new red law report.

Correct Answer: B and F

B beside A only puts B at an end next to A, and A fourth from F puts F at the opposite end, so the extremes are B and F.

Correct Answer: Q

The rows work out as P, N, R and M, Q, O, so N faces Q.

Correct Answer: 20

If the test has T questions, 12 / T = 60%, so T = 12 / 0.60 = 20.

Correct Answer: White

Red opposite black leaves blue, white, brown and the sixth colour as the side faces; with white and brown both beside blue in the side cycle, white sits opposite brown.

Correct Answer: 22

The basket doubles each day, so it is half full on day 23 and one-quarter full on day 22.

Correct Answer: 15

Any non-empty subset of the 4 coins gives a different sum, and there are 2^4 - 1 = 15 such subsets.

Correct Answer: 20 km

If x km were on foot, x/4 + (50 - x)/10 = 8, giving x = 20 km.

Correct Answer: 15

Any non-empty subset of the 4 notes gives a different sum, and there are 2^4 - 1 = 15 such subsets.

Correct Answer: 1024

Each of the 10 questions has 2 possible answers, so the number of sequences is 2^10 = 1024.

Correct Answer: 36

The greatest common divisor of 78, 104, 117 and 169 is 13 cm, giving 6 + 8 + 9 + 13 = 36 pieces.

Correct Answer: Some villagers under twenty five are literate.

Under-25 villagers are 80% and literate villagers are 33%, so their overlap is at least 80 + 33 - 100 = 13%, meaning some under-25 villagers are certainly literate.

Correct Answer: 99

In 300-399 exactly one 4 in the tens or units place gives 9 + 9 = 18 numbers, and in 400-499 with no further 4 gives 9 x 9 = 81 numbers, totalling 99.