# number theory, math

posted by
**frm** on
.

How many ordered pairs of positive integers (a,b) are there such that (4a-1)/b and (4b-1)/a are both integers?

posted by
**frm** on
.

How many ordered pairs of positive integers (a,b) are there such that (4a-1)/b and (4b-1)/a are both integers?