Question

In the following question, find the missing number.

• A. $2031$
• B. $731$
• C. $1625$
• D. $1$

Answer 1

The correct option is A $2031$

In the figure, each number is obtained by multiplying the previous circle no. with the middle circle no. and then adding 1.

We have $3\times 5+1=16$,

$16\times 5+1=81$,

$81\times 5+1=406$

So, the missing no. is $406\times 5+1=2031$.

Hence 2031 replaces question mark.