1) Prove log_10 15 is irrational. (log base 10)
2) find gcd( 5!20!, 10!15!)
for 1), I was thinking something like 10<sup>x</sup> = 15 where x needs to be an integer, which is not true;
for 2), I was told to "simplified" those factorials, but i did it on a smaller scale(ie with 2s...