mathschallenge.net logo

Shading Pattern

Problem

In the 3x3 grid, 6/9 is shaded and in the 4x4 grid, 10/16 is shaded.


If a 20x20 grid was shaded in the same way, what fraction would be shaded?

Problem ID: 101 (Feb 2003)     Difficulty: 1 Star

Show Problem & Solution