agree

來源: 於 2016-11-22 09:44:02 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

The sum of any two positive odd numbers is even.

The sum of an even number and an odd number is odd.

Therefore the sum of three positive odd number is odd.

This question is to ask to get an even number (30) from the sum of three odd numbers. 

If there is a solution, it must not be mathematical solution!!!