Tag Archives: 15

change the odd one out 5, 10, 15, 20, 81, 25, 30?

A. 5
B. 10
C. 25
D. 81

Complete the series 1, 3, 7, 15, 31, 63, ?

A. 123
B. 125
C. 127
D. 129

Complete the series 11, 15, 24, ___65, 101?

A. 39
B. 40
C. 48
D. 50