Everyday numbers,silly questions,real math.
🤖 Ideas come from people. AI does the rest. How it's made & about →
A collection of invented mental exercises taken straight from daily life — folded paper, toilet paper, pizza, showers. No classroom tone: just numbers you can almost hold in your hand.
✨ Newest exercise
NEW6 min
The never-off lights
How much fuel do all the world's vehicles — cars, trucks, motorcycles — burn every day just to keep their daytime lights on?
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10 min
Fold it to the Moon
How many times must you fold the sheet so that its thickness reaches the Moon?
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7 min
How much does the world poop?
How much poop does humanity produce per second?
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8 min
The great toilet-paper odometer
How many rolls of toilet paper does the whole town use in a year — and if you unrolled them into one strip, how far would it reach?
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