IDENTIFYING SETS FOR REAL WORLD SITUATIONS WORKSHEET ANSWERS

Question 1 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The number of people wearing glasses in a room"

Question 2 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The circumference of a flying disk has a diameter of 8, 9, 10, 11, or 14 inches"

Question 3 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The amount of water in a glass as it evaporates"

Question 4 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The number of seconds remaining when a song is playing, displayed as a negative number"

Question 5 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The change in the value of an account when given to the nearest dollar"

Question 6 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The markings on a standard ruler"

Detailed Answer Key

Question 1 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The number of people wearing glasses in a room"

Answer : 

The set of whole numbers best describes the situation. The number of people wearing glasses may be 0 or a counting number.

Question 2 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The circumference of a flying disk has a diameter of 8, 9, 10, 11, or 14 inches"

Answer : 

The set of irrational numbers best describes the situation. Each circumference would be a product of π and the diameter, and any multiple of π is irrational.

Question 3 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The amount of water in a glass as it evaporates"

Answer : 

Real numbers ; the amount can be any number greater than 0.

Question 4 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The number of seconds remaining when a song is playing, displayed as a negative number"

Answer : 

Possible answer : Real numbers ; the number of seconds left can be any number less than 0, depending on the display device.

Question 5 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The change in the value of an account when given to the nearest dollar"

Answer : 

Integers ; the change can be a whole dollar amount and can be positive, negative, or zero.

Question 6 : 

Identify the set of numbers that best describes the situation given below. Explain your choice.

"The markings on a standard ruler"

Answer : 

Rational numbers ; the ruler is marked every 1/16 th inch.

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