Question

2

5

10

17

?

37

Find the number that will come in the place of '?'.

• A. 32
• B. 20
• C. 25
• D. 26

Answer 1

The correct option is D 26

The sequence:

2

5

10

17

?

37

$2=1\times 1+15=2\times 2+110=3\times 3+117=4\times 4+137=6\times 6+1$
The sequence follows multiplication of consecutive natural numbers by itself and adding 1 to the result.
So, the missing natural number that follows the sequence is '5'.

Hence the missing number is:
$5\times 5+1=26$