OEIS link for a description of lunar arithmetic

Simply take the larger digit.

Example 1:

    5
  + 6
  ____
    6

Example 2:

    456
  + 789
  _____
    789

Example 3:

        86
   + 12374
    ______
     12386

Example 4:

       29
     1652
  + 95412
   ________
    95659
Solve

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215 Solutions

60 Solvers

Last Solution submitted on Mar 02, 2026

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George Berken Mehdi Dehghan Sang Lorenzo

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