Find the missing number in the series: 5, 10, 20, 40, ?, 160.

B. 80

Teacher is to Classroom as Doctor is to ?

A. HOSPITAL

Five boxes are labeled A, B, C, D, and E. Box A contains more items than Box B but fewer than Box C. Box D contains fewer items than Box E. Which box contains the least items?

C. D

Identify the pattern: 1, 1, 2, 3, 5, 8, ?

D. 13

What comes next in the pattern: X, Y, Z, A, B, ?

A. C