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Class 14
REASONING
15 12 17 10 ? 8 21 6...

15 12 17 10 ? 8 21 6

A

19

B

3

C

7

D

21

Text Solution

Verified by Experts

The correct Answer is:
D
The given sequence ofnumber follows the pattern :
- 3, + 5, - 7, + 11, - 13, + 17, - 19
i.e., consecutive prime numbers.

Therefore, Missing number = 10 + 11 = 21
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