What's the optimal strategy?

Binary search. Start at 50; depending on higher/lower, halve the remaining range. Guarantees a win in 7 guesses or fewer for any 1-100 target.

Games · Free tool

Number Guess

Guess the secret number 1-100. Higher/lower hints. Best attempts saved.

Updated May 2026

I'm thinking of a number from 1 to 100

Attempts: 0

Optimal binary-search strategy gets any 1-100 number in at most 7 guesses. Random guessing averages ~50.

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What it does

Classic 1-100 number guessing game with higher/lower feedback. Lowest attempts saved as your best.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/number-guess" width="100%" height="720" frameborder="0" loading="lazy" title="Number Guess" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>

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How to use it

Type a number 1-100.
Press Guess or Enter.
Use higher/lower hints to narrow down.

Frequently asked questions

What's the optimal strategy?: Binary search. Start at 50; depending on higher/lower, halve the remaining range. Guarantees a win in 7 guesses or fewer for any 1-100 target.

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