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
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5 6149

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
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9 6149

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
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124 6146

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 6112

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 6111

Q:

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

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

Answer & Explanation Answer: C) Mercury

Explanation:

Mercury is the only liquid metal in the group.

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Filed Under: Classification

44 6110

Q:

Artist is to painting as senator is to

A) politician	B) constituents
C) attorney	D) law

Answer & Explanation Answer: D) law

Explanation:

As we know that an artist makes paintings, similarly, a senator makes laws.

Hence, Artist : Painting :: Senator : Law.

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Filed Under: Analogy
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5 6107

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