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 :
$12+1 \times 23=35$
$35+2 \times 23=35+46=81$
$81+2 \times 46=81+92=173$
$173+2 \times 92=173+184=357$
$357+2 \times 184=357+368$ $=725$