Guess the Number

Pick a number between 1 and 100, then guess. After each try you'll get a simple higher or lower hint, and you narrow the range until you land on it exactly.

The optimal strategy is to always guess the midpoint of what's left — start at 50, then 25 or 75, and so on — which finds any number in at most seven guesses. Try to beat that, or just play it loosely as a quick daily warm-up. Your best (fewest guesses) is saved locally so you can try to beat yourself next time.