Science

How many litres of blood does the human heart pump each day?

7,500 L. Enough to fill a small backyard swimming pool — every single day.

How close would your guess have been?

Type a number — scored exactly the way a round in the game is.

The answer

7,500L

Quest Giggle turns questions like this one into 30-second duels. Closest guess takes the round — free on iOS and Android.

2–4 player duels