3100+ Mental Ability Reasoning Questions and Answers with Explanation

Q:

In the following question, select the related number pair from the given alternatives.

43 : 27 : : ? : ?

A) 77 : 65	B) 91 : 87
C) 65 : 49	D) 69 : 55

Answer & Explanation Answer: C) 65 : 49

Explanation:

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18 95282

Q:

What will come in place of the question mark (?) in the following number series?

312 231 295 ? 282 257

A) 210	B) 25
C) 246	D) 279

Answer & Explanation Answer: C) 246

Explanation:

The series follows a pattern that,

-9², +8², -7², +6², -5²

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43 94852

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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75 94000

Q:

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

Deep: Shallow::Ocean: _______

A) Pond	B) Depth
C) Well	D) Spring

Answer & Explanation Answer: A) Pond

Explanation:

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Q:

A girl introduced a boy as the son of' the daughter of the father of her uncle. The boy is girl's

A) Brother	B) Son
C) Uncle	D) Son-in-law

Answer & Explanation Answer: A) Brother

Explanation:

Daughter of uncle's father — Uncle's sister — Mother;

Mother's son — Brother

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Filed Under: Blood Relations

1431 93252

Q:

In the following question, select the related word pair from the given alternatives.

River : Krishna : : ? : ?

A) Planet : Sun	B) Mountain : K2
C) Moon : Satellite	D) Earth : Grass

Answer & Explanation Answer: B) Mountain : K2

Explanation:

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13 93161

Q:

In the following question, select the missing number from the given series.

7, 11, 15, 19, 23, ?

A) 29	B) 30
C) 27	D) 31

Answer & Explanation Answer: C) 27

Explanation:

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34 93026

Q:

Which fraction comes next in the sequence

$\frac{2}{3}, \frac{1}{3}, \frac{5}{27}, \frac{7}{81}, ?$

A) 1/27	B) 11/278
C) 9/48	D) 7/123

Answer & Explanation Answer: A) 1/27

Explanation:

Clearly, the numerators of the fractions in the given sequence follow the series of 2, 3, 5, 7,... and the denominator follows 3, 9, 27, 81, 243, ...
Then, the next term in the given sequence is $\frac{9}{3^{5}} = \frac{9}{243} = \frac{1}{27}$ .

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28 92354

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