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Four integers (Posted on 2016-12-04) Difficulty: 3 of 5
Find four distinct positive integers such that:
a. Each of them is below 500.
b. Multiplying any two of them and then incrementing the product by 1
produces a square number.

No Solution Yet Submitted by Ady TZIDON    
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Hints/Tips re: Master of the obvious | Comment 4 of 8 |
(In reply to Master of the obvious by Steve Herman)

It is true, but since a*b + 1 is  a square if a = b=0 your amendment might be generalized  like:


 Same answer if either  the word "distinct" or the word "positive" were removed from the problem.



  Posted by Ady TZIDON on 2016-12-12 18:48:11
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