In the series 2, 4, 8, 16, what is the next number?

B. 32

Complete the series: a, c, e, g, ?

B. H

All mammals are warm-blooded. Is this statement true or false?

A. TRUE

Which of the following does not belong in the series: 3, 6, 9, 12, 15, 18, 20?

D. 20

Find the missing letter in the series: b, d, f, h, ?

A. J