This page contains the official solutions to each Problem of the Week. After participants have had time to think, explore, and submit their ideas, the full explanations are posted here. Each solution highlights the key insight behind the problem and encourages learners to compare their reasoning with the presented approach. We hope these solutions deepen understanding and inspire creative problem solving.
Our solutions are written to be educational — not just correct. Each published solution includes:
Solutions are listed in chronological order. You can decide whether to reveal solutions immediately or after a delay (e.g., one week later).
The first POW solution will be published after Week 1 submissions close. Check back on Monday, April 7, 2026.
Always attempt the problem yourself before reading the solution. The learning comes from the struggle.
Even if you got the right answer, compare your method with the official solution. You might discover a more efficient or elegant approach.
Pay attention to the key concepts highlighted in each solution. These are building blocks for more advanced problems.
Submitted a correct answer? Check the Hall of Fame to see if your name has been listed among the top solvers!
Haven't tried this week's problem yet? Give it a go before reading the solution!
View This Week's POW