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four or more (Posted on 2010-01-25) Difficulty: 4 of 5
Without evaluating the value of N=5*7^34 prove that at least one digit appears in the number four or more times.

See The Solution Submitted by Ady TZIDON    
Rating: 4.0000 (1 votes)

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Fortissimo Comment 2 of 2 |

Clearly this intends 5 * (7 ** 34), since the alternate precedence would have far more than 30 digits, forcing more than three of one or more digits.  I had originally counted 30 digits for the parenthesized expression (54116...) forcing 31 for the whole expression.  My error, as previous post correctly shows.

 

 

Edited on January 25, 2010, 5:35 pm
  Posted by ed bottemiller on 2010-01-25 17:00:49

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