Number Series
Number Series - Important Points
| 11. | In the series: 2, 2, 5, 13, 28,... What number should come next? |
|---|
A. 56
B. 58
C. 54
D. 52
View Answer Discuss Work SpaceAnswer: option d
Explanation:
The pattern is + 0, + 3, + 8, + 15, ..... i.e. + (1^2 - 1), + (2^2 - 1), + (3^2 - 1), + (4^2 - 1), .....
So, missing term = 28 + (5^2 - 1) = 28 + 24 = 52.
| 12. | In the series: 1, 5, 14, 30, 55, 91,... What number should come next? |
|---|
A. 132
B. 140
C. 151
D. 162
View Answer Discuss Work SpaceAnswer: option b
Explanation:
The pattern is + 4, + 9, + 16, + 25, + 36, ..... i.e. + 2^2, + 3^2, + 4^2, + 5^2, + 6^2,.....
So, missing term = 91 + 7^2 = 91 + 49 = 140.
| 13. | In the series: 2, 7, 27, 107, 427,... What number should come next? |
|---|
A. 807
B. 1707
C. 1307
D. 1327
View Answer Discuss Work SpaceAnswer: option b
Explanation:
The pattern is + 5, + 20, + 80, + 320, ...... i.e. + (5 x 12), + (5 x 22), + (5 x 42), + (5 x 82),.....
So, missing term = 427 + (5 x 162) = 427 + 1280 = 1707.
| 14. | In the series: 7, 26, 63, 124, 215, 342,... What number should come next? |
|---|
A. 381
B. 431
C. 481
D. 511
View Answer Discuss Work SpaceAnswer: option d
Explanation:
The terms of the given series are (2^3 - 1), (3^3 - 1), (4^3 - 1), (5^3 - 1), (6^3 - 1), (7^3 - 1),.....
So, missing term = (8^3 - 1) = (512 - 1) = 511.
| 15. | In the series: 3, 12, 27, 48, 75, 108,... What number should come next? |
|---|
A. 147
B. 157
C. 183
D. 191
View Answer Discuss Work SpaceAnswer: option a
Explanation:
The terms of the given series are 3 x 1², 3 x 2², 3 x 3², 3 x 4², 3 x 5², 3 x 6²,.....
So, missing term = 3 x 7² = 3 x 49 = 147.
Number Series Questions and Answers FAQ
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