How many significant figures are there in the number 24.006?
A significant figure is one that has been experimentally determined by a measurement. Numbers generated by calculations are not significant.
The .006 would not have been written ( at least correctly) if the value had not been measured to nearest nearest one thousandth (
The .006 has three significant numbers.
The 24. has also been measured for two more significant numbers.
There are a total of five significant numbers.
( This is a very precise balance.)
Two important rules for determining how many significant figures are in a number are:
- Non-zero digits are always significant.
- Zeros between two significant digits are significant.
In the number
- The numbers
#2, 4#, and #6#are significant.
- The zeroes are between
#4#and #6#, so they are significant.
All the digits are significant.
∴ There are 5 significant figures.