Topic F Part 3: Prime & Composite Numbers

Open Ended

Why is it important to know whether a number is prime or composite in mathematics?

Multiple Choice

Which of the following statements about factors is correct?

• 6 is a factor of 18, 5 is a factor of 20, 7 is a factor of 21, 4 is a factor of 15

• 6 is a factor of 18, 5 is a factor of 20, 7 is not a factor of 21, 4 is a factor of 15

• 6 is a factor of 18, 5 is a factor of 20, 7 is a factor of 21, 4 is not a factor of 15

• 6 is not a factor of 18, 5 is a factor of 20, 7 is a factor of 21, 4 is a factor of 15

Open Ended

Explain how you would determine if a number is a factor of another number.

Multiple Choice

Which of the following statements best describes a prime number?

• A number with only two distinct positive factors: 1 and itself.

• A number with more than two positive factors.

• A number that is always even.

• A number that is a multiple of 10.

Multiple Choice

Which of the following numbers are composite?

• 7

• 16

• 1

• 5

Open Ended

Why is the number 1 considered a special case when discussing prime and composite numbers?

Multiple Choice

What is the main difference between a prime number and a composite number according to the classification method described?

• Prime numbers have only two factors, while composite numbers have more than two factors.

• Prime numbers are always odd, while composite numbers are always even.

• Prime numbers are less than 10, while composite numbers are greater than 10.

• Prime numbers can be divided by 3, while composite numbers cannot.

Open Ended

Based on the numbers 2, 9, 13, 15, 17, and 20, classify each as prime or composite and explain your reasoning.

Open Ended

List all the factors of 18. Is 18 a prime or composite number? Explain your reasoning.

Multiple Select

Which of the following numbers are composite? Select all that apply: 8, 13, 15, 17.

• 8

• 13

• 15

• 17

Open Ended

After watching the video on recognizing prime and composite numbers, describe one strategy you learned for identifying whether a number is prime or composite.

Multiple Choice

Which of the following numbers is a prime number?

• 7

• 9

• 12

• 15

Multiple Select

Which of the following numbers are composite numbers?

• 4

• 5

• 6

• 7

Open Ended

Explain the difference between prime and composite numbers.

Open Ended

What makes a number prime?

Open Ended

List all the factors of 9. Is it prime or composite?

Open Ended

After learning about prime and composite numbers, what questions do you still have or what would you like to know more about?

Open Ended

What is one way you can determine if a number is prime or composite?