Free interactive math game: Express as Power — 64 = 2^?. Part of the Powers & Roots category on MathKite.
Taken from the generator that powers this exercise. A fresh set appears every time the page is opened, and the printable worksheet holds ten of them.
Writing a number as a power of a given base.
Divide repeatedly by the base and count how many times it goes in.
81 is 3 x 3 x 3 x 3, so it is 3 to the power 4.
Miscounting the steps. Reaching 1 after four divisions means an exponent of 4, no more and no less.