Tag Archives: 15

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

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

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

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

Find odd one out in the following series: 3, 9, 15, 24, 27, 28, 30?

A. 28
B. 24
C. 30
D. 15

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

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

Complete the number series: 3, 7, 6, 5, 9, 3, 12, 1, 15, __________?

A. 21
B. -3
C. -1
D. 13

Complete the number series: 3, 7, 6, 5, 9, 3, 12, 1, 15, ______?

A. 21
B. -3
C. -1
D. 13

What number comes in the series: 3, 8, 15, 24, …?

A. 33
B. 35
C. 38
D. 40

What will the least common multiple of 5, 15, 20 and 25?

A. 100
B. 200
C. 300
D. 400

Which one number will complete the series: 8, 13, 10, 15, 12, 17, 14, ______?

A. 19
B. 22
C. 16
D. 20

If the average arithmetic mean of 8, 12, 15, 211 x and 11 is 17 then what is x?

A. 3
B. 15
C. 17
D. 35