Significant figures

What is the purpose of significant figures?

• To make numbers look more important
• To make calculations easier
• To indicate the precision of a measurement
• To confuse students

What is the difference between 5.6 and 1.23, rounded to the correct number of significant figures?

• 4.0
• 4.37
• 4.4
• 4

What is the sum of 3.45 and 2.1, rounded to the correct number of significant figures?

• 5.6
• 5.55
• 6
• 6.0

What is the difference between 7.8 and 2.34, rounded to the correct number of significant figures?

• 5.0
• 5
• 5.46
• 5.5

What is the quotient of 7.8 divided by 2.1, rounded to the correct number of significant figures?

• 4.0
• 4
• 3.71
• 3.7

How many significant figures are in the number 500?

• 4
• 3
• 2
• 1

What is the quotient of 9.6 divided by 2.3, rounded to the correct number of significant figures?

• 4.17
• 4.2
• 4.0
• 4

What is the product of 2.5 and 3.4, rounded to the correct number of significant figures?

• 8.5
• 8
• 8.0
• 8.50

What is the quotient of 8.9 divided by 1.2, rounded to the correct number of significant figures?

• 7.4
• 7
• 7.0
• 7.42

Which of the following numbers has 3 significant figures?

• 0.050
• 0.500
• 0.5000
• 0.005