Math topic中文

Colouring problems

Use alternate colouring and parity pairing to prove impossibility or count coverings and walks on grids.

Learn these first

Odd and even numbers

Practice questions

  1. 1A 3×73 \times 73×7 rectangle is covered without overlap by 3 shapes of tiles: 2×22 \times 22×2, 1×41 \times 41×4, and 1×11 \times 11×1,…