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Entertain Every Value? (Posted on 2014-04-29) Difficulty: 3 of 5
The respective number of digits of 4n and 25n - when added together is odd, whenever n is a positive integer.

Does this assertion hold for every value of n?

If so, prove it.
If not, provide a counter example.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Solutiona short proofAdy TZIDON2014-04-30 04:32:00
Solutionproof (acceptable?)Jer2014-04-29 14:10:04
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