Question 15
Find all perfect powers that end with the digits 2, 0, 0, 8, in that order.
CLARIFICATION: A perfect power is a number of the form $a^k$ where $a$ and $k$ are positive integers and $k \geq 2$. For example, $6^2$; $2^7$; $100^3$.
CLARIFICATION: A perfect power is a number of the form $a^k$ where $a$ and $k$ are positive integers and $k \geq 2$. For example, $6^2$; $2^7$; $100^3$.