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Choose the correct alternative so that a...

Choose the correct alternative so that a series can be established .
5, 6, 9, 15, (….), 40

A

27

B

21

C

33

D

25

Text Solution

Verified by Experts

The correct Answer is:
D
The given sequence follows the pattern :
+1, +3, +6, +15.
i.e. +1, + (1 + 2), + (1 + 2 + 3),
+ (1 + 2 + 3 + 4), + (1 + 2 + 3 + 4 + 5).

Therefore, Missing term = 15 + (l + 2 + 3 + 4) = 25.
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