2to the power of n • 2 divided by 2 to the power of 5 = 2to the power of 2 what is n

If I understand correctly, what you're saying is 2^2n ÷ 2^5 = 2^4

the easiest way to do this is to get rid of the fraction by multiplying both sides by 2^5 and getting
2^2n = 2^9 (Because when you multiply exponents with the same base you add the exponents)
Because the bases are the same you can set the exponents equal to each other getting 
2n=9
n=9/2 or 4.5

The year before the 10s so it was like when caveman were alive