Question

What is the next number in the series: 4, 5, 9, 25, 89, ___

Answer 1

The answer is 345 (don’t ask why)

Answer 2

345

Explanation:

1 + 4 = 5

4 + 5 = 9

16 + 9 = 25

64 + 25 = 89

1, 4, 16, and 64 are powers of 4. The next power of 4 is 256.

256 + 89 = 345