Homework Help: math

Posted by Stephanie on Friday, September 5, 2008 at 12:31am.

A man selling fruit has only three weights. But with them he can weigh any whole number of kilograms (from 1 kg to 13 kg) inclusive on his balance.

What weights does he have?

I can't figure this out

math - Kalyan, Friday, September 5, 2008 at 4:38am
The man had 1kg, 3kg and 9 kg weights.
- math - Stephanie, Friday, September 5, 2008 at 7:10pm
  How did you get this answer?
math - madison, Friday, September 5, 2008 at 11:12am
what is the weiight of a semi trailer

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