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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)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Answer Comment 3 of 3 |
(In reply to Answer by Math Man)

Excellent!
  Posted by Steve Herman on 2011-12-17 09:43:18

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