Number Series Completion - General Inteligence & Reasoning MCQ Questions and Answers

1

Find out the wrong term: 5, 27, 61, 122, 213, 340, 509

A) 27 B) 61 C) 122 D) 509

Discuss

Answer & Solution

Answer: Option A

Solution:

The terms of the series are (2³ - 3), (3³ - 3), (4³ - 3), (5³ - 3), (6³ - 3), (7³ -3), (8³ -3).
So, 27 is wrong and must be replaced (3³ - 3) i.e., 24

2

Find out the wrong term: 6, 15, 35, 77, 165, 221

A) 35 B) 77 C) 165 D) 221

Discuss

Answer & Solution

Answer: Option C

Solution:

The terms of the series are product of two consecutive prime numbers i.e., (2 × 3), (3 × 5), (5 × 7), (7 × 11),...........
So, 165 is wrong and must be replaced by (11 × 13) i.e., 143.

3

Find out the wrong term: 121, 143, 165, 186, 209

A) 143 B) 165 C) 186 D) 209

Discuss

Answer & Solution

Answer: Option C

Solution:

Each term in the series is obtained by adding 22 to the preceding term.
So, 186 is wrong and must be replaced by (165 + 22) i.e., 187.

4

Find out the wrong term: 24576, 6144, 1536, 386, 96, 24

A) 96 B) 386 C) 1536 D) 6144

Discuss

Answer & Solution

Answer: Option B

Solution:

Each term of the series is obtained by dividing the preceding term by 4.
So, 1536 is wrong and must be replaced by (1536 ÷ 4) i.e., 384.

5

Find out the wrong term: 16, 22, 30, 45, 52, 66

A) 30 B) 45 C) 52 D) 66

Discuss

Answer & Solution

Answer: Option B

Solution:

The correct pattern is + 6, + 8, + 10, + 12, + 14.
So, 45 is wrong and must be replaced by (30 + 10) i.e., 40.

6

Find out the wrong term: 8, 14, 26, 48, 98, 194, 386

A) 14 B) 48 C) 98 D) 194

Discuss

Answer & Solution

Answer: Option B

Solution:

The correct pattern is × 2, - 2.......
So, 48 is wrong and must be replaced by (26 × 2 - 2) i.e., 50.

7

Find out the wrong term: 8, 13, 21, 32, 47, 63, 83

A) 13 B) 21 C) 32 D) 47

Discuss

Answer & Solution

Answer: Option D

Solution:

The correct pattern is + 5, + 8, + 11, + 14, ............
So, 47 is wrong and must be replaced by (32 + 14) i.e., 46

8

Find out the wrong term: 10, 26, 74, 218, 654, 1946, 5834

A) 26 B) 74 C) 218 D) 654

Discuss

Answer & Solution

Answer: Option D

Solution:

The correct pattern is × 3, - 4,............
So, 654 is wrong and must be replaced by (218 × 3 - 4) i.e., 650.

9

Find out the wrong term: 4, 10, 22, 46, 96, 190, 382

A) 4 B) 10 C) 96 D) 382

Discuss

Answer & Solution

Answer: Option C

Solution:

The correct pattern is + 6, + 12, + 24, + 48, + 96, + 192 ............
So, 96 is wrong and must be replaced by (46 + 48) i.e., 94

10

Find out the wrong term: 1, 3, 10, 21, 64, 129, 356, 777

A) 21 B) 129 C) 10 D) 356

Discuss

Answer & Solution

Answer: Option D

Solution:

The correct pattern is × 2 + 1, × 3 + 1, × 2 + 1, × 3 + 1,...........
So, 356 is wrong and must be replaced by (129 × 3 + 1) i.e., 388.