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A number plus its reversal (Posted on 2018-12-03) Difficulty: 1 of 5
List all two digit numbers that if reversed and added to the original number create a perfect square.

See The Solution Submitted by Ady TZIDON    
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soln | Comment 1 of 6
29 38 47 56 and their reverses add to 121.
(The 4 line computer program is simply too easy to resist writing.)

If you ask what 3 digit numbers reversed and added make a cube, you can get a pair as well (and a 2nd pair if you allow a trailing/leading 0).

Edited on December 4, 2018, 9:51 am
  Posted by Steven Lord on 2018-12-03 10:23:48

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