Number Series Ques 46

Question-

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

$2 \begin{array}{lllll}3 & 7 & 29 & ? & 3729\end{array}$

(1) 233

(2) 225

(3) 227

(4) 331

(5) 191

(IBPS Bank PO/MT CWE (Pre.), 16.10.2016 (First Sitting))

Show Answer

Correct Answer: (1)

Solution: (1)

The pattern is :

$2 \times 1+1=3$

$3 \times 2+1=6+1=7$

$7 \times 2^{2}+1=28+1=29$

$29 \times 2^{3}+1=232+1=233$

$233 \times 2^{4}+1=3728+1=3729$