## 2012/01/15

### 組合問題 Combination

Find the combination of the values of positive integers $a$, $b$ and $c$ if $a+b+c=10$.

[挑戰]

Find the combination of the values of positive integers $a$ and $b$ if $a+b+c=N$ where $N>3$.

[再挑戰]

Find the combination of the values of positive integers $a$, $b$ and $c$ if $a+b+c=10$.