Four
Two of them.
Two of them
3 of them.
Just the one and it is 4
One. The zeros are placeholders.
There are four significant digits in the number 1.071.
Three significant digits.
This number has seven significant digits.
All four of the digits given are significant digits.
There are two significant digits in the number 83.
All numbers which are not "zero" are classed as significant digits. Therefore in the number 129 there will be three digits which are classed as significant.
Two. All nonzero digits are significant.
There are 2 significant digits: 5 and 4
There are four significant digits in the number 6.741.
All the digits are significant, so there are 5 significant digits.
The number 42.31 pounds has four significant digits.