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| Erase one (Posted on 2017-05-28) |
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Given the numbers 1,2,3,4,…,n can you always erase one number so that the mean of the remaining numbers is an integer?
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Submitted by Ady TZIDON
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Solution:
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answer: yes
for odd n, erase the middle number.
for even, erase either 1 or n.
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Subject |
Author |
Date |
 | Can do | Steve Herman | 2017-05-28 10:28:07 |
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