SNAP Number Series questions

Which is the seventh number in the sequence 5, 9, 16, 29, 54,

Find the missing number in the series:
16, _ , 68, 88

Find the missing number : 2, 6, 20, 42, 110 __________

The numbers in these series are arranged in a triangle which has a logic as shown. Find the missing numbers shown as (?) from the choices given below:

Replace the question mark with the right option.
4, 32, 288, ?, 31680

What number will replace the question mark?