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5 ways of factorizing (Posted on 2018-07-07) Difficulty: 3 of 5
What is the smallest number that can be shown as a difference between two squares in 5 different ways?

See The Solution Submitted by Ady TZIDON    
Rating: 3.0000 (1 votes)

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Solution A lower spoiler | Comment 2 of 3 |
I like xdog's methodology, but I think a lower number that qualifies is 144.

144 can be factored as (2*72),(4*36),(6*24),(8,18) and (12,12)

This leads to squares (37,35), (20,16), (15,9), (13,5) and (12,0)

The last one is controversial, but I argue that 144 = 12^2 - 0^2

  Posted by Steve Herman on 2018-07-07 19:08:31
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