#### (a) How many significant figures are in the numbers 99 and 100?

(b) If the uncertainty in each number is 1, what is the percent uncertainty in each?

(c) Which is a more meaningful way to express the accuracy of these two numbers, significant figures or percent uncertainties?

**SOLUTION:**

(a) 99 has 2 significant figures

100 has 3 significant figures

(b)

(c) Based on the results of parts a and b, the percent uncertainties are more meaningful.