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File: 1446652763955.jpg (35.11 KB, 460x276, 5:3, cows460x276.jpg)

a42dd0 No.135

Say there is a herd of an odd number of cows with the property that if you take any one cow away, it is possible to divide the remaining heard into two herds with equal numbers of cows and equal weight. Show that all the cows in the original heard have the same weight.

e09874 No.138

>>135

I give up. Answer please.


e09874 No.139

I can tell you that any two cow's weight must be congruent mod 4, but that's as far as I can get.


e09874 No.140

Okay, I finally got the answer. This was really hard, where did you get it?


e09874 No.141

Also you don't need an equal number of cows in each herd.



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