# Lesson Worksheet: Prime and Composite Numbers Mathematics

In this worksheet, we will practice deciding whether a number is prime or composite using models and finding the prime factors of a number.

**Q1: **

Which of the following is the prime factorization of 11?

- A
- B1
- C
- D
- E11

**Q2: **

What is the largest prime factor of 120?

**Q3: **

The prime factorization of a number is . What is the number?

**Q4: **

Find the prime factoring of 16.

*Hint*: Draw a factor tree to help you.

- A
- B
- C
- D
- E

**Q5: **

Find the prime number where the sum of the factors is 84.

**Q6: **

Is 23 a prime or a composite number?

- Aa composite number
- Ba prime number

**Q7: **

Find the smallest number whose prime factors are 3, 5, and 7.

**Q8: **

Which of the following is not a prime number?

- A23
- B73
- C68
- D2

**Q9: **

Yara has found that .

Is 91 a prime or a composite number?

- Aa composite number
- Ba prime number

**Q10: **

Find the missing number in the given Venn diagram.