Billy
secondary

Write a two digit number (both digits different and neither equal to zero) and then express the same number but now composed of the same two digits in reverse order with some mathematical symbol (+, -, *, /, roots, !, or exponents). for example: 25 = 5^2. Now give me another.

Hope you get this, cause its driving me CRAZY

I can tell you one more but I am not sure if there are others. The one I have is

64 = root(4^6)

Cheers,
Penny

After showing him this answer Billy wrote back with another solution

24=root((4!)^2)