Which of the following is the smallest unit of length?
nanometer
yoctometre
picometre
femtometre
Yocto is a unit prefix in the metric system denoting a factor of 10−24 or 0.000000000000000000000001. It was adopted in 1991 by the General Conference on Weights and Measures. It comes from the Latin/Greek octo (οκτώ), meaning "eight", because it is equal to 1000−8. Yocto- is the smallest official SI prefix.
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Answers by country
nanometer
yoctometre
picometre
femtometre
answers
the Netherlands
12
Australia
24
India
114
Greece
14
the United States
60
Germany
94
Poland
1469
Austria
24
the United Kingdom
38
Nigeria
17
Pakistan
10