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√22 (Posted on 2017-10-18) Difficulty: 4 of 5
It easy to show that √2 is an irrational number

So is the square root of any non-square number.

Prove that √22 is an irrational number, providing a reasoning applicable to any random-chosen non-square integer.

See The Solution Submitted by Ady TZIDON    
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  Subject Author Date
Solutionshort general proofCharlie2017-10-18 15:28:53
Slightly longer proofJayDeeKay2017-10-18 13:19:38
SolutionDon't be square (spoiler)Steve Herman2017-10-18 12:26:50
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