# math

how 20 people are divide in 7 days such that each day gets an odd?

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1. I don't see any way.
Each odd number is of the form 2k+1
Add up 7 of those, and you have a sum of the form 2n+7 = 20
But 2n cannot be 13.

The sum of an odd number of odd numbers cannot be even.

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posted by Steve

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