3100+ Mental Ability Reasoning Questions and Answers with Explanation

Q:

In the following series of numbers, howmany 1, 3, 7 have appeared together. 7 being in middle and 1, 3 on either side of ??

2 9 7 3 1 7 3 7 7 1 3 3 1 7 3 8 5 7 1 3 7 7 1 7 3 9 0 6

A) 4	B) 5
C) 3	D) More than 5

Answer & Explanation Answer: C) 3

Explanation:

3 1 7 3 7

3 1 7 3 8

7 1 7 3 9

At these places 1, 7, 3 appeared together

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Filed Under: Number, Ranking and Time Sequence Test

10 2983

Q:

Introducing a boy, Amar says, "He is the son of the only daughter of my maternal grandmother." How is the boy related to Amar?

A) Cousin	B) Brother
C) Father-in-law	D) Nephew

Answer & Explanation Answer: B) Brother

Explanation:

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Filed Under: Blood Relations

3 2983

Q:

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

A) Arm	B) Finger
C) Shoulder	D) Foot

Answer & Explanation Answer: D) Foot

Explanation:

All except foot are parts of hand

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Filed Under: Classification

19 2978

Q:

In three coloured boxes - Red, Green and Blue, 108 balls are placed. There are twice as many balls in the green and red boxes combined as there are in the blue box and twice as many in the blue box as there are in the red box. How many balls are there in the green box ?

A) 76	B) 54
C) 64	D) 48

Answer & Explanation Answer: B) 54

Explanation:

Let R, G and B represent the number of balls in red, green and blue boxes respectively.

Then, .

R + G + B = 108 ...(i),

G + R = 2B ...(ii)

B = 2R ...(iii)

From (ii) and (iii), we have G + R = 2x 2R = 4R or G = 3R.

Putting G = 3R and B = 2R in (i), we get:

R + 3R + 2R = 108 6R = 108 R = 18.

Therefore Number of balls in green box = G = 3R = (3 x 18) = 54.

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Filed Under: Arithmetical Reasoning
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk

2 2965

Q:

$a^{2} + b^{2} + c^{2} - ab - bc - ca = 0, iff$

A) abc = -1	B) a = b = c
C) abc = 1	D) abc = 0

Answer & Explanation Answer: B) a = b = c

Explanation:

Here given formula is

$a^{2} + b^{2} + c^{2} - ab - bc - ca = 0$

and it is possible if and only if a = b = c.

From the trial and error method,

1) Let a = b = c = 1

Now substitute these values of a, b, c in the above formula.

We get 1 + 1 + 1 - 1 - 1 - 1 = 3 - 3 = 0

2) Now, let a = b = c = 4

Now substitute these values of a, b, c in the above formula.

We get 16 + 16 + 16 - 16 - 16 - 16 = 48 - 48 = 0.

Hence, it is possible that

$a^{2} + b^{2} + c^{2} - ab - bc - ca = 0 iff a = b = c.$

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Filed Under: Arithmetical Reasoning
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

4 2965

Q:

You are a team leader and you are supposed to hold a convention on HR issue. But your team members are unable to get adequate sponsorship.

A) You put in your money and hold the event as scheduled	B) You try and motivate them that they can do it
C) You postpone the event and give them some more time	D) You tell them things can work out like this and cancel the event

Answer & Explanation Answer: B) You try and motivate them that they can do it

Explanation:

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Filed Under: Situation Reaction Test

36 2962

Q:

An Assertion (A) and a Reason (R) are given below.

Assertion (A) : Beri-Beri is a viral infection.

Reason (R) : Vitamin deficiency causes diseases.

Choose the correct option.

A) A is false but R is true	B) A is true but R is false
C) Both A and R are false	D) Both A and R are true and R is the correct explanation of A

Answer & Explanation Answer: A) A is false but R is true

Explanation:

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Filed Under: Assertion and Reason
Exam Prep: Bank Exams

2 2960

Q:

Select the missing number from the given responses.

A) 45	B) 65
C) 70	D) 80

Verbal Reasoning - Mental Ability Questions

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