mtayab1994
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oay said:Sorry for butting in, but I like to think of myself as a decent mathematician who has terrible difficulty with number theory.
I couldn't solve this at all. I had to write a program to solve for all cases for 1 to 1000 and I got the same answers: 3 & 7
Could someone please tell me where I'm going wrong analytically?
PS I've read post #2.
But you're missing -3 and 1 they are also answers in Z.