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Select the number from the given options that can replace the question mark (?) in the given series. 7, 14, 21, 28, ?
Question

Select the number from the given options that can replace the question mark (?) in the given series.
7, 14, 21, 28, ?

A.

. 26

B.

30

C.

32

D.

35

Correct option is D

Given:
7,14,21,28,?
Logic: In this given series the difference of two consecutive numbers is +7.
14 - 7 = 7 
21 - 14 = 7 
28 - 21 = 7 
Similarly:
? - 28 = 7 
? = 28 + 7
? = 35
Alternate method
The pattern followed here is,
7___14___21___28___35
   +7       +7      +7     +7
= 35
Thus, correct option is (d).

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