Help with hard math problems?
1. When the digits of a two-digit number are reversed, the result is another two-digit number that is 62.5% smaller than the original number. What is the original number? 2. How many ordered pairs of integers (a,b) satisfy the following equation? (1/a)+(1/b)=1/6 [I have this one in an equations but I have no idea how to go about it from there. The equation I have is 6b-ab+6a=0]