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Number Guessing Game.

Guess the secret number. Too High or Too Low?

Difficulty

1 – 100

Guess a number in this range

Make your first guess

0

Attempts

—

Best (Medium)

// How to play

Pick a difficulty, type a number, and hit Guess (or press Enter). You get a hint after each guess — Too High or Too Low. Find the number in as few guesses as possible.

// Pro tip

Always guess the middle of the remaining range. Binary search finds any number in at most 7 guesses on Medium (1–100).

What Is the Number Guessing Game?

The number guessing game is a classic logic puzzle where the computer secretly picks a number and you try to find it. After every guess, you get a hint telling you whether your guess was too high or too low — narrowing the range until you land on the answer.

This free online version has four difficulty levels — Easy (1–50), Medium (1–100), Hard (1–500), and Expert (1–1000) — so you can choose how big a challenge you want. Your best score for each difficulty is tracked in-session so you can try to beat it.

How to Play

Three steps to start:

1

Choose a difficulty — Easy for a quick game, Expert for the full challenge

2

Type a number and hit Guess or press Enter — you'll get Too High or Too Low

3

Keep narrowing the range until you land on the correct number — your guess history tracks every attempt

Your attempt count resets each game and your best score per difficulty is saved for the session. Hit Play Again to start a new game with a fresh secret number.

Difficulty Levels

Each level uses a wider number range — so more guesses are needed:

Easy1–50

Perfect for beginners or a quick game. Binary search solves it in at most 6 guesses.

Medium1–100

The classic version. Binary search finds the number in at most 7 guesses.

Hard1–500

A wider range that requires more careful guessing. Up to 9 guesses with binary search.

Expert1–1000

The hardest mode. Binary search can still solve it in at most 10 guesses.

The Best Strategy: Binary Search

The optimal strategy is called binary search — always guess the exact middle of the remaining possible range. Each guess eliminates half the remaining numbers, so you always converge on the answer in the fewest possible guesses.

For example, on Medium (1–100): start with 50. If Too High, guess 25. If Too Low from there, guess 37. Keep halving the range and you will find any number in at most 7 guesses.

The same principle applies on Expert (1–1000) — binary search still solves it in 10 or fewer guesses even though the range spans a thousand numbers.

Frequently asked questions.

How do you play the number guessing game?
The computer picks a random number and you try to guess it. After each guess you get a hint — Too High or Too Low — until you find the correct number.
What difficulty levels are available?
There are four difficulty levels: Easy (1–50), Medium (1–100), Hard (1–500), and Expert (1–1000). Each level uses a different number range.
Is the number guessing game free?
Yes — completely free, no sign-up required, works on any device. Play unlimited games across all difficulty levels.
What is the best strategy for the number guessing game?
Always guess the middle number of the remaining range — this is called binary search and it finds any number in the minimum number of guesses possible.

Try our other free tools

Need help with a different kind of decision? Try one of our free tools below.

Play the number guessing game — free and instant

No download, no sign-up, no ads. Pick your difficulty, start guessing, and see how few attempts you need. Works on desktop, tablet, and mobile.