3100+ Mental Ability Reasoning Questions and Answers with Explanation

Q:

Find the missing number in the following series?

2, 3, 10, 39, ?, 885

A) 128	B) 156
C) 172	D) 189

Answer & Explanation Answer: C) 172

Explanation:

Take a Look at the below sereies

$2 \times 1 + (1^{2}) = 3$

$3 \times 2 + (2^{2}) = 10$

$10 \times 3 + (3^{2}) = 39$

$39 \times 4 + (4^{2}) = 172$

$172 \times 5 + (5^{2}) = 885$

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Filed Under: Number Series

74 46091

Q:

Seismography : Earthquake :: Taseometer : ?

A) Landslides	B) Strains
C) Resistances	D) Volcanoes

Answer & Explanation Answer: B) Strains

Explanation:

Seismography is an instrument to measure the intensity of an earthquake.

Similarly, taseometer is an instrument to measure strains.

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Filed Under: Analogy
Exam Prep: AIEEE , Bank Exams , CAT
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1129 45934

Q:

Find the missing number in the given series ?

15, 51, 216, 1100, ?, 46452

A) 5660	B) 6560
C) 6750	D) 6630

Answer & Explanation Answer: D) 6630

Explanation:

Let first no. be "k" and multiple be "l"...start value of y with 3
then,
[(k x y) + {l x (l-1)}]
Thus, we get

15 x 3 + 3 x 2 = 51
51 x 4 + 4 x 3 = 216
216 x 5 + 5 x 4 = 1100
1100 x 6 + 6 x 5 = 6630
6630 x 7 + 7 x 6 = 46452

Therefore, the missing number is 6630.

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Filed Under: Number Series
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50 45810

Q:

If Z= 2197 and R= 729. How would J be written in that code?

A) 216	B) 124
C) 512	D) 125

Answer & Explanation Answer: D) 125

Explanation:

$Z C o d e \Rightarrow 26 \Rightarrow \frac{26}{2} \Rightarrow 13 \Leftrightarrow (13^{3}) = 2197$

$R C o d e \Rightarrow 18 \Rightarrow \frac{18}{2} \Rightarrow 9 \Leftrightarrow (9^{3}) = 729$

Similarly, $J C o d e \Rightarrow 10 \Rightarrow \frac{10}{2} \Rightarrow 5 \Leftrightarrow (5^{3}) = 125$

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Filed Under: Coding and Decoding

653 45270

Q:

Select the related word/letters/number from the given alternatives.

6 : 108 : : 11 : ?

A) 363	B) 333
C) 253	D) 340

Answer & Explanation Answer: A) 363

Explanation:

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Filed Under: Analogy
Exam Prep: Bank Exams

1 45217

Q:

Choose the pair which shows the same relation of the given pair from the following options ?

BRISTLE : BRUSH

A) arm : leg	B) key : piano
C) recline : chair	D) stage : curtain

Answer & Explanation Answer: B) key : piano

Explanation:

A bristle is a part of a brush; a key is a part of a piano.

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Filed Under: Analogy
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10 45202

Q:

Fill in the blank with a suitable word from the given words.

All the efforts of the batsmen went _____ vain as the bowlers failed to perform well.

A) for	B) off
C) in	D) out

Answer & Explanation Answer: C) in

Explanation:

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Filed Under: Analogy
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12 45127

Q:

Choose the correct alternative that will replace the question mark in the given series

DHL, PTX, BFJ, ?

A) KOS	B) NRV
C) NPS	D) NRU

Verbal Reasoning - Mental Ability Questions

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