Here's one of the solutions (in attachment).
Please view above ^^^^^^
Anyway, if you cannot read what it says here it is:
The 5 Olympic rings cut the plane into 15 pieces (not counting what is outside the circles). Arrange the numbers 1 through 15 in these pieces so that the sum of the numbers inside each ring is 39.
NOTE: THESE ARE NOT THE CLASSIC OLYMPIC RINGS. PLEASE VIEW THE PICTURE BEFORE ANSWERING