Stumpty

About Stumpty

Stumpty is a small website built around one question a day. Its maker writes that the idea is to keep minds sharp by working through a challenge each day, even when you do not crack it. The challenges vary: a simple word riddle one day, a tougher maths question or a puzzle that needs you to step back and look at the bigger picture on another.

The front page shows the date, the Challenge of the day and a difficulty badge. On 6 October 2026 the Easy question asked for the angle between the clock hands at 1:20; on 7 October the Medium question asked what number thirty students should all write down so that each of them matches the class average. You type your answer into the Submission box. A hint stays locked until you have made a first attempt.

The Yesterday's solution page shows the previous day's question and its full working, each hidden behind a tap so you can try it first. There is deliberately no archive: the site asks you to come back each morning for the next one.

A separate Twenty Four page offers the old card game for practice: four numbers from 1 to 10 are dealt and you make 24 with addition, subtraction, multiplication, division and brackets, using each number once. Stumpty is free, needs no account and suits anyone who likes a single short puzzle to think about over coffee.

How to play Stumpty

1. Open stumpty.com to see today's date, the Challenge of the day and its difficulty.
2. Read the question and work out your answer.
3. Type the answer in the Submission box and press Submit answer.
4. If your first attempt is wrong, open the hint that unlocks and try again.
5. Come back the next day to read the full solution on the Yesterday's solution page and to get a new teaser.

Tips

• Read every word of the question: the medium and hard teasers often turn on one detail, such as rounding or who is counted.
• For maths teasers, try a tiny example first (two students instead of thirty, a simpler time on the clock) to see the pattern.
• Make a real first attempt before giving up, because the hint only unlocks after one.
• Check the Yesterday's solution page even when you solved it; the working often shows a quicker route.
• Warm up on the Twenty Four page if you like number puzzles.

Questions