What is the missing term in the series: 10, 20, 40, 80, ?, 320

A. 160

Find the missing number in the series: 5, 11, 23, 47, ?, 191

B. 93

What is the missing term in the series: 1, 2, 4, 8, ?, 32

B. 16

What number should replace the question mark in the series: 1, 4, 9, 16, ?

B. 25

Identify the missing number in the series: 2, 5, 10, 17, ?

B. 25