What number would replace the question mark in the series: 1, 7, 16, 28, 43, 61, 82, ?

The next term is 106.

Write consecutive differences: 6, 9, 12, 15, 18, 21.

These rise by a fixed step of 3 each time.

The next difference is 21 + 3 = 24.

82 + 24 = 106.

This is a series with differences in arithmetic progression.