Question 28
Answer-format rule: round a non-integer answer to the nearest integer. If the calculated answer has more than five digits, give its last five digits.
Integers $x,y>1$ make both $25/x$ and $61/y$ reduced fractions, and $25/x+61/y$ is an integer. How many ordered pairs $(x,y)$ are possible?
Integers $x,y>1$ make both $25/x$ and $61/y$ reduced fractions, and $25/x+61/y$ is an integer. How many ordered pairs $(x,y)$ are possible?