Let us define the set T = {1,2,3,...,700}. Now, S is a subset of T such that no two numbers in S differ by a difference of 2 or 5.

Determine the largest number of elements that S can have.

Erroneous solution,

Edited on January 2, 2014, 7:41 pm

Posted by Ady TZIDON on 2014-01-02 10:14:00