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Distinct Digit Determination II (Posted on 2010-12-15) Difficulty: 3 of 5
Each of A and B is a (base 15) positive integer , with A containing precisely 201 digits and, B containing precisely 202 digits, where:

A = 77..779 (the digit 7 is repeated precisely 200 times followed by 9), and: B= 77..779 (the digit 7 is repeated precisely 201 times followed by 9)

Determine the distinct digits in the base 15 representation of A2. What are the distinct digits in the base 15 representation of B2?

*** For an extra challenge, solve this puzzle without the help of a computer program.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Some ThoughtsManual Approach (spoiler)Steve Herman2010-12-16 16:27:38
Solutioncomputer solutionCharlie2010-12-15 19:07:19
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