What comes next in the following series?
A1, B8, A27, B64, ?
Show answer & explanation
Correct answer: B
Explanation
Series = A1, B8, A27, B64, ?
The letters A and B alternate, and the numbers are consecutive cubes.
1 = 1³
8 = 2³
27 = 3³
64 = 4³
Next number = 5³ = 125
Letter sequence:
A, B, A, B, A
A125