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Ending in 5 (Posted on 2015-08-11) Difficulty: 3 of 5
N is a positive integer ending in 5 – that is, positive integers like 2015, 21335, 349705 etc.

Under what conditions do gcd(N, floor(N2/100)) exceed 1?

(For example, if N = 2015, then floor(N2/100) = 40602, so that:
gcd (N, floor(N2/100)) = 1, which contravenes the provisions of the problem.)

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
SolutionPossible solutionJer2015-08-11 11:34:13
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