Number Series Ques 113

Question-

What will come in place of the question mark (?)

$257 \quad 129 \quad 65 \quad 33 \quad 17 \quad$ ?

(1) 9

(2) 5

(3) 6

(4) 8

(5) 3

Show Answer

Correct Answer: (1)

Solution: (1)

The pattern is:

$\frac{257+1}{2}=\frac{258}{2}=129$

$\frac{129+1}{2}=\frac{130}{2}=65$

$\frac{65+1}{2}=\frac{66}{2}=33$

$\frac{33+1}{2}=\frac{34}{2}=17$

$\frac{17+1}{2}=\frac{18}{2}=9$