Which number comes next in this series - 26, 28, 31, 35, ?

Answer 1

The differences are 2, 3, 4 etc., so naturally the next difference is 5 which means the next term is 35 + 5 = 40.

Answer 2

40.

Incremental series of +2, +3,+4,+5.

Answer 3

40
As 26+2=28
28+3=31
31+4=35
So 35+(5)=40