📊 Level the Towers
Why isn’t the average just the middle one?
Five friends read 1, 3, 3, 5 and 8 books this month. The one in the middle read 3. So on average they read 3 books… right? Let’s build their towers and level them out.
Start leveling ↓Take from the tall. Give to the short.
Press Next step. Every cube is one book.
🧱 Book towersStep 1 of 8
“The average? That’s the one in the middle!”
The average (the mean) is where the towers end up
when you level them out.
when you level them out.
Tap a tall tower to pick up its top cube, then tap a short tower to drop it. Or drag. Keyboard: Tab to a tower, press Enter to pick up, Enter on another tower to drop.
Your turn: 5 leveling challenges
Same towers, same cubes. Can you find the level every time, even when the middle tries to trick you?
🎯 Challenge0 of 5 done
⭐ You beat the trap
The mean is the level line.
Meanlevel the towers out:
add them all, share equally
add them all, share equally
Medianthe middle tower,
once they’re lined up
once they’re lined up
Modethe height you
see most often
see most often
1, 3, 3, 5, 8 has 20 cubes. Shared by 5 friends, that’s 20 ÷ 5 = 4 each. The middle one is 3, and nobody has exactly 4, but 4 is the fair share. One really tall tower pulls the mean up, while the middle one doesn’t budge.