Question

Which of the following prefixes would be best for measuring small objects like the width of a piece of paper?

1.hecta
2.kilo
3.deca
4.centi

Answer 1

From Largest to smallest unit of measure:

KILO means 1000

HECTO means 100

DEKA means 10

DECI means 1/10

CENTI means 1/100

MILLI means 1/1000

Accordingly, the answer is 4 or D, for Centi. Of the options provided Centi is the smallest unit of measure. Width is a red herring to confuse you.

Answer 2

Hecta is the prefix meaning 100 times;
Kilo means 1000 times;
Deca is one tenth;
and Centi is one hundredth.
In this case, the smallest and most suitable for measuring small objects would be Centi.