I'm thinking of a number between 1 and 100. Can you find it in the fewest guesses?
A random number between 1 and 100 is picked when the page loads. Type a guess and you'll be told if the answer is higher or lower — use binary search logic (start at 50, then halve the range each time) to solve it in 7 guesses or fewer.
With optimal binary search play (always guessing the midpoint of the remaining range), you can always find any number 1-100 in 7 guesses or fewer.
Yes, your lowest attempt count is saved in your browser and shown at the top as your best.