The number 40 has how many significant figures?

2 Answers
Catherine T. Mohs · EZ as pi
Apr 18, 2017

#1#

Explanation:

It has one because the #4# is the significant digit and the #0# doesn't count. However, if you had #40.0#, you would have three, because the #0# after the decimal point and the #4# count and the numbers between the significant digits also count.

Martin M. · EZ as pi
Apr 18, 2017

There is only #1# significant figure in the number #40.#

Explanation:

Since there is no decimal point in the number, the trailing zero is not significant. Therefore the number #40# has only #1# significant figure.

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