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How many bones, litres of blood, heartbeats per day? The human body told through its numbers.
Free questions with no sign-up, where every answer is a number. Type your estimate: the closer you get to the right answer, the more points you score.
A free game mixes every topic. To play only “Human Body & Biology”, Premium accounts can filter topics in the game settings.
Type your estimate and check it: you'll see the right answer and your points.
1
How many years does a person spend asleep over an entire lifetime?
Answer: 25
2
How many pairs of ribs make up the rib cage of a healthy adult human?
Answer: 12
3
How many times a minute does a person blink without thinking about it?
Answer: 15
4
How many hairs does an average human head have?
Answer: 120,000
5
By how many millimetres does a hair lengthen in one month?
Answer: 12 mm
6
How many fingers and toes does a human being have in total?
Answer: 20