Tag Archives: 31

Which number is wrong in the series: 1, 2, 6, 15, 31, 56, 91.

A. 31
B. 91
C. 56
D. 15

Complete the number series: 11, 13, 17, 19, 23, 29, 31, 37, 41 ,________?

A. 43
B. 47
C. 53
D. 51

Complete the series: 1, 3, 7, 15, 31, 63______

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

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

A. 124
B. 127
C. 126
D. 129

Complete the number series: 11, 13, 17, 19, 23, 29, 31, 37, 41, ________?

A. 43
B. 47
C. 51
D. 53

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

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