In a game of 100 points, A can give B 20 points and C 28 points. How many points can B give C in a game of 100?

Explanation

1. 01

   When A scores 100, B scores 80 and C scores 72.

2. 02

   When B scores 100, C scores $\frac{72}{80} \times 100 = 90$, so B can give C 10 points.