Sequence and Series

1) 4, 9, 16, 25, ....
(A) 32
(B) 42
(C) 55
(D) 36

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Answer: Option D

Explanation:
Each number is a whole square.

2) 0, 7, 26, 63, ....
(A) 125
(B) 126
(C) 124
(D) 98

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Answer: Option C

Explanation:
Numbers are 1³-1, 2³-1, 3³-1, and so on.

3) 5, 8, 13, 21, ....
(A) 55
(B) 34
(C) 52
(D) 37

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Answer: Option B

Explanation:
The sum of 1st two numbers (5 & 8) is the third (13) and the sum of next two.

4) 3, 7,13, 19, ....
(A) 23
(B) 17
(C) 37
(D) 29

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Answer: Option A

Explanation:
Each number of the series is the next prime number 13. Which one number will complete the series: 8, (indivisible by any other number).

5) Complete the sequence 66250, 13250, 2650, 530, ...
(A) 106
(B) 66
(C) 306
(D) 206

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Answer: Option B

Explanation:
Divide by 5.

6) 3, 5, 9, 17, ....
(A) 26
(B) 65
(C) 33
(D) 42

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Answer: Option C

Explanation:
2nd number (5) is twice the 1st number minus one, similarly 3rd number (9) is twice the second number

7) 4, 11, 7, 14, 10, 17, ...., ....
(A) 13, 20
(B) 20, 13
(C) 15, 22
(D) 22, 15

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Answer: Option A

Explanation:
There are 2 series. 4, 7, 10, ... and 11, 14, 17, ...

8) 2, 6, 12, 20, 30, 42, ....
(A) 56
(B) 54
(C) 50
(D) 62

View Answer

Answer: Option A

Explanation:
The difference between two consecutive numbers are 4, 6, 8, 10, 12 and 14 respectively.

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