How Many...?

Write how many of the unit given you would find in the category. Pretty simple, right?
All to nearest integer.
* indicates roughly, so it'll be a nice number like 20000.
Apologies for the excessive use of moons!
Quiz by
LegoBuilderOne
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Last updated: October 22, 2025
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First submittedMarch 12, 2025
Times taken36
Average score60.0%
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Category (Units)
Answer
Distance ran in marathon (km/miles)
42/26
Keys on a standard piano (number)
88
Oldest person ever (years)
122
People on the Moon (number)
12
Water in the human body* (percentage)
60
Rings on the Olympic flag (number)
5
Colours on the South African flag (number)
6
Cloud weight* (tonnes)
1000000
Moons of Jupiter (number)
95
Brains in an octopus (number)
9
Languages with 100+ million speakers (number)
15
Radius of Earth's inner core* (km/miles)
1200/800
Moon stages/faces (number)
8
Teeth as an adult (number)
32
Average sleep time* (hours)
7
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