Given positive integer n, consider the set of numbers {n²+1, n²+2, ... (n+1)²}. If we pick two numbers x and y out of that set, how many different values can the product xy take?

(In reply to re(3): what am I missing? - to Josh by pcbouhid)

absolutely right, i miscounted.  it should be n(2n+1).  thanks

Posted by Josh70679 on 2005-08-16 23:28:11