1. After carrying out the following operation, the reported value should have how many significant figures?

(6.943 cm – 5.81 cm) × 3.23 cm

A. 2
B. 3
C. 4
D. 5
E. 6

2. Which measurement below contain 3 significant figures?

I. 0.02 cm
II. 1.32 mL
III. 0.000500 kg

A. I and II
B. I and III
C. II and III
D. II only
E. I, II, and III

3. Which of the following has the same number of significant figures as the number 1.00310?

A. 5 × 10⁶
B. 299.782
C. 7.92
D. 9.234
E. 300