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Prime Mean (Posted on 2013-04-17) Difficulty: 3 of 5
At the end of a soccer season, every player on a team scored a prime number of goals, and the average for the team as a whole was also a prime number. No playerís tally was equal to anotherís, and no playerís tally was the same as the average.

Given that nobody scored more than 45 goals, how many goals did each player score?

*** There are 11 players in a soccer team.

No Solution Yet Submitted by K Sengupta    
Rating: 4.0000 (3 votes)

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Solution re: possible solution | Comment 2 of 5 |
(In reply to possible solution by broll)

A neat little puzzle.


my reasoning was:


 Deducting any sum which is 6 mod 11 from 281(the total of first 14 primes) gives a multiple of 11, say 11*q.

IF q is a prime number, and the sum bay be created by
a triplet of distinct primes below 45 - the remaining set of 11 numbers is the answer.

 e.g. an average of 20 is obtained by discounting(eliminating)   the triplet ( 3,17,41  ).  281-61=220  ==>220/11=20   nice, but not a prime! -the erased triplet must include  2   to get odd result!

BUT: an average 19 is obtained by discounting(  the triplet ( 2,29,41  ).  281-72=209  ==>209/11=19 ...nice, but  the set includes 19 - forbidden..

An average 23 is obtained by discounting(  the triplet ( 2,3,23  ).  281-48=253  ==>253/11=23

so OUR SOLUTION IS : (5,7,11,13,17,19,29,31,37,41, 43).

  Posted by Ady TZIDON on 2013-04-17 12:01:29
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