Question

Find the next number in the series 2,4,9,31,127, ?

Answer 1

$2 \times 2 + 5 \\ 9 \times 3 + 4 \\ 31 \times 4 + 3 \\ 127 \times 5 + 2 = 637$

Answer 2

Answer:

Here it is given that

2,4,9,31,127,…

So,

$2 \times1 + 2 = 4$

$4 \times 2 + 1 = 9$

$9 \times 3 + 4 = 31$

$31 \times 4 + 3 = 127$

Therefore,

$127 \times 5 + 6 = 641$