1, 2, 9, 64, ?

Select the number from among the given options that can replace the question mark (?) in the following series.
1, 2, 9, 64, ?

Option
a) 225
b) 570
c) 450
d) 625

Solution

1, 2, 9, 64, ?
Series is 1⁰, 2², 3², 4³, 5⁴,
5⁴ = 625

Answer: d) 625