Question

Find out the missing number in the following series.
2,7,11,21,35,_______

(A) 61
(B) 64
(C) 70
(D) None of the above
​

Answer 1

2

7 -2 =5

11 -7= 4

21 -11= 10

35 -21= 14

here we observe that first gap is 5,

but it doesn't match the other .

∴ the answer will be none of this

Ans :-(D) none of the above

Answer 2

Sequences are the grouped arrangement of numbers orderly and according to some specific rules.

Given:

$2,7,11,21,35,...$

$7-2=5\\11-7=4\\21-11=10\\35-21=14$

Hence we can see the pattern is not continuous

Therefore option $D$ is answer.