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5-digit period (Posted on 2011-12-16) Difficulty: 3 of 5
What are two primes p > 0 for which 1/p has a purely periodic decimal expansion with a period 5 digits long?

Source: California math competition 2001

No Solution Yet Submitted by Ady TZIDON    
Rating: 4.0000 (3 votes)

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  Subject Author Date
re: AnswerSteve Herman2011-12-17 09:43:18
Solutioncomputer solutionCharlie2011-12-16 22:13:25
SolutionAnswerMath Man2011-12-16 10:25:24
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