3100+ Mental Ability Reasoning Questions and Answers with Explanation

Q:

In the following question, various terms of an alphanumerical series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives. Q1F, S2E, U6D, W21C, ?

A) Z88B	B) Y88B
C) Y44B	D) K25P

Answer & Explanation Answer: B) Y88B

Explanation:

The first letter moves two steps forward. The last letter moves one steps backward. The number series runs as follows :
1 x 1 + 1 = 2
2 x 2 + 2 = 6
6 x 3 + 3 = 21
21 x 4 + 4 = 88.

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Filed Under: Number Series

9 6155

Q:

The sum of three numbers is 98. If the ratio of the first to the second is 2:3. And that of the second to the third is 5:8, then the second number is:

A) 30	B) 27
C) 23	D) 33

Answer & Explanation Answer: A) 30

Explanation:

Then, A:B = 2:3 and B:C = 5:8
= (5 x 3/5) : (8 x 3/5) = 3:24/5
A:B:C = 2:3:24/5
= 10:15:24 => B = 98 x 15/49 = 30.

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Filed Under: Arithmetical Reasoning
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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5 6140

Q:

Antonym of the Word : efface

A) burn	B) face
C) erase	D) create

Answer & Explanation Answer: C) erase

Explanation:

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Filed Under: Alphabet Test
Exam Prep: AIEEE , Bank Exams , CAT , GRE , TOEFL
Job Role: Bank Clerk

9 6137

Q:

$\begin{matrix} C K & 16 & 9 & J R \\ O S & 24 & 19 & T X \\ K M & ? & ? & P V \end{matrix}$

A) 14,21	B) 21,14
C) 56,84	D) 84,56

Answer & Explanation Answer: B) 21,14

Explanation:

Putting A=1, B=2, C=3,..., M=13,....,X=24,Y=25, Z=26, we have :

$J R = \frac{J + R}{2} + 2 = \frac{10 + 18}{2} + 2 = 16$

$C K = \frac{C + K}{2} + 2 = \frac{3 + 11}{2} + 2 = 9$

$T X = \frac{T + X}{2} + 2 = \frac{20 + 24}{2} + 2 = 24$

$O S = \frac{O + S}{2} + 2 = \frac{15 + 19}{2} + 2 = 19$

So, the missing numbers are :

21 and 14

Hence, the answer is (b).

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Filed Under: Inserting The Missing Character
Exam Prep: TOEFL , GRE , Bank Exams , AIEEE
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124 6135

Q:

How many numbers amogst the numbers 9 to 54 are there which are exactly divisible by 9 but not by 3 ?

A) 5	B) 6
C) 0	D) 9

Answer & Explanation Answer: C) 0

Explanation:

Any number divisible by 9 is also divisible by 3.

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Filed Under: Number, Ranking and Time Sequence Test

15 6103

Q:

At what time will B catch up with A, if A starts from a place at 11.00 A.M. and travels at a speed of 3.5 kmph, B starts at 1.00 P.M. and travels with speeds of 1 kmph for 1 hour, 2 kmph for the next 1 hour, 3 kmph for the next 1 hour and so on.

A) 8 : 47 pm	B) 6 : 40 pm
C) 8 : 42 pm	D) 7 : 40 pm

Answer & Explanation Answer: D) 7 : 40 pm

Explanation:

At 1 pm ... Distance between A and B = 2x3.5 = 7 kms
at 2 pm .....Distance between A and B = 7 + 3.5 - 1 = 9.5 kms
At 3 pm ....Distance between A and B = 9.5 + 3.5 - 2 = 11 kms.
..
..
..
At 7 pm distance between A and B = 3 kms.
From 7 pm to 8 pm, speed of A = 3.5 kmph
speed of B = 8 kmph
Relative speed = 4.5 kmph

Time taken by B to meet A = 3/4.5 hrs = 30/45 hrs = 120/3 mins = 40 mins.

So meeting time is 7 : 40 PM.

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Filed Under: Arithmetical Reasoning
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2 6103

Q:

A is the son of B, C. B's sister has a son D and a daughter E. F is the maternal uncle of D. How is E related to F ?

A) Sister	B) Daughter
C) Niece	D) Wife

Answer & Explanation Answer: C) Niece

Explanation:

E is the daughter of C and D is the son of C. So, F, who is the maternal uncle of D, is also the maternal uncle of E.

Thus, E is the niece of F.

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Filed Under: Blood Relations

0 6103

Q:

Choose the word which is least like the others word in a group?

A) Zinc	B) Aluminium
C) Mercury	D) Copper

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