Number Series Ques 114

Question-

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

$\begin{array}{llllll}12 & 35 & 81 & 173 & 357 & \text { ? }\end{array}$

(1) 725

(2) 715

(3) 726

(4) 736

(5) None of these

Show Answer

Correct Answer: (1)

Solution: (1)

The pattern of the number series is :

$12+1 \times 23=35$

$35+2 \times 23=35+46=81$

$81+2 \times 46=81+92=173$

$173+2 \times 92=173+184=357$

$357+2 \times 184=357+368$ $=725$