perplexus.info :: Just Math : Duplicate Digit Determination II

Duplicate Digit Determination II (Posted on 2010-11-19)

If the tetradecimal (base 14) representation of 2^P and 7^P start with the same (non-zero) digit for a positive integer P, what is that digit? Can you prove that it must be so?

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

re: An analogous case.

| Comment 2 of 3 |

(In reply to An analogous case. by Jer)

Well done!

Posted by Ady TZIDON on 2010-11-20 05:28:44

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