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The Last Three Digits (Posted on 2007-08-28) Difficulty: 3 of 5
A number and its square both have the same last three digits. What are the possibilities for those digits?

See The Solution Submitted by Brian Smith    
Rating: 4.0000 (3 votes)

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Solution (not necessarily a full list) | Comment 1 of 9

000, 001, 376, 625

Examples:

1000^2 = 1,000,000

1001^2 = 1,002,001

376^2 = 141,376

625^2 = 390,625


  Posted by Guest on 2007-08-28 13:46:00
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