A little challenge from a friend
A fresh test for your intuition.
Look. Guess. Discover. Get a little closer every day.
BasketballsCount the objectsWarm-up
15s
Filling up with curiosity…
Left jarRight jar
Drag to explore
Let your intuition take it from here.
Time to guess. Enter your estimate below.
How many are in there?
Your guess—
Actual count—
Relative error—
Your rounds, at a glance
Your guessActual count
Progress saved automatically. Come back anytime.
A little more curiosity?
No pressure, no limits. Something new in every round.