Question

What should come as next number in the series? 3,11,32,55,91

Answer 1

In this arrangement the contrast between back to back terms are as per the following: -

11 - 3 = 8 23 - 11 = 12 = 8 + 4 × 1 39 - 23 = 16 = 8 + 4 × 2 59 - 39 = 20 = 8 + 4 × 3.

Now, let the following number in the arrangement be x. So x-59=8 + 4×4=24.

Therefore, x=59+24=83.