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Integer Diagonal (Posted on 2023-10-18) Difficulty: 3 of 5
Find a rectangular prism whose edges and main diagonal have integer lengths, such that the squares of the edges are 10-digit pandigital numbers.

  Submitted by K Sengupta    
Rating: 5.0000 (1 votes)
Solution: (Hide)
There seems to be only one solution, which in fact, did have 2 of the lengths equal.

side 1  side 2  side 3  diagonal
45624   91248   91248   136872.0

The squares of each side is indeed a 10-digit pandigital:
2081549376  8326197504  8326197504

Check :
    45624^2 + 91248^2 + 91248^2 = 18733944384
    136872^2 = 18733944384

For an explanation, refer to the solution submitted by Larry in this location.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(2): Computer solutionCharlie2023-10-18 16:08:39
re: Computer solutionCharlie2023-10-18 15:50:22
SolutionComputer solutionLarry2023-10-18 14:18:16
Solutionhmmm... a sort-of computer solution (spoiler)Charlie2023-10-18 12:08:24
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