A classic number game – and a clever lesson
Guess the number is one of the oldest and simplest games: one player thinks of a number, the other guesses, and the only hints are “higher” or “lower”. Kids practise comparing numbers and planning, and the progress bar shows how the possible range shrinks with each guess.
Switch the mode and the computer guesses your number. It always starts in the middle – the halving strategy (binary search) – and never needs more than 7 guesses for 1–100 or 10 for 1–1000. Can you play as smart as the computer? Your best result for each range is saved.
How to use
- Choose a range: 1–10, 1–100, 1–1000 or your own.
- Type a guess and press Guess.
- Follow the hints “higher” and “lower” until you find it.
- Switch the mode to let the computer guess your number.
Ideas for using it
- Little ones. 1–10 with “warmer / colder” hints.
- Maths lesson. show how halving finds any number from 1–1000 in 10 steps.
- Two players. one thinks, the other types; then swap.
- Quick break. a round takes under a minute.