What is the missing number in the series: 12, 24, 48, 96, ?, 384

A. 192

What is the next number in the series: 12, 24, 48, 96, ?

A. 192

What is the missing number in the series: 2, 6, 12, 20, ?, 42

B. 32

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

C. 97

What number should replace the question mark in the series: 1, 4, 9, 16, ?, 36

A. 25