How many significant digits are in 5000?

Answer 1

Just one. The trailing zeros are not significant.

* * * * *

Not true.

Integers with trailing 0s are ambiguous. You cannot differentiate between 500o as a number rounded to

the nearest thousand (1 significant digit), or

the nearest hundred (2 sig digits), or

the nearest ten (3 sig digits) or

the nearest unit (4 sig digits).

Answer 2

There are four significant digits in 5000.

Answer 3

69