General Maths Puzzle Numerical Ability Sequence and Series

In the following series, a wrong number is given. Find out that wrong number, and decide which option should replace that wrong number.
1, 4, 8, 9, 25, 16, 64,....

Read Solution (Total 2)

Wrong number is 25

1^3 = 1
2^2 = 4
2^3 = 8
3^2 = 9
3^3 = 27
4^2 = 16
4^3 = 64

so "25" should be replaced by "27"
10 years agoHelpfull: Yes(17) No(1)

here all are square number except 8
So number 8 can be replaced by any square number given in options.
10 years agoHelpfull: Yes(1) No(3)

General Other Question

Find the wrong number in the following series.
10, 21, 43, 85, 175,..... In the following question a series is given and it is followed by the starting point of another series. After this, a question is given, you have to complete the second series by applying the same logic as in the first given series, and then you have to answer the question.
5, 8, 12, 17, 23, 30,.....
9, a, b, c, d, e,.....
Which number should come in place of c?