**Q2: **

Is 21 a prime or a composite number?

- A a composite number
- B a prime number

**Q3: **

Is 23 a prime or a composite number?

- A a prime number
- B a composite number

**Q4: **

All prime numbers are odd except .

**Q5: **

Determine whether the number 226 is prime, composite, or neither.

- Aneither prime nor composite
- Bprime
- Ccomposite

**Q6: **

Caribou calves weigh about 13 pounds at birth. Is the number 13 a prime or a composite number?

- Aprime
- Bcomposite

**Q7: **

A teacher asked her class to color all the prime numbers between 1 and 10. Here are some of their answers. Which one is correct?

- A
- B
- C
- D
- E

**Q8: **

Michael is learning about prime numbers. He knows that 5 is a prime number, because the only factors of 5 are 1 and 5.

Is 9 a prime number? Why?

- A No, because 3 is a factor.
- B Yes, because its only factors are 1 and 9.

**Q9: **

Benjamin says that 1 is a prime number because it only has 1 factor pair.

Is he correct? Why?

- A No, because all odd numbers are prime.
- B Yes, 1 only has one factor.
- C Yes, because all odd numbers are prime.
- D No, prime numbers have two factors, 1 only has one factor.
- ENo, prime numbers have more than two factors, 1 only has one factor.

**Q10: **

Madison says that every even number is composite because 2 is a factor.

Is she correct? Why?

- A Yes, because all odd numbers are prime.
- B Yes, because 2 is an even number.
- C Yes, because 2 is even and composite.
- D No, because 2 is even and prime.
- E No, because 2 is even and composite.

**Q12: **

Isabella bought these four raffle tickets, and one of them was the winning ticket.

- A ticket number 34
- B ticket number 15
- C ticket number 23
- D ticket number 17
- Eticket number 18

**Q13: **

The table shows all the factors of some numbers.

Number | 101 | 133 | 157 | 145 |
---|---|---|---|---|

Factor of | 1, 101 | 1, 7, 19, 133 | 1, 157 | 1, 5, 29, 145 |

Which of the numbers are prime?

- A 101 and 133
- B 133 and 145
- C 157 and 145
- D 101 and 157
- E133 and 157

**Q14: **

Which of the following is a prime number?

- A 4
- B 8
- C 45
- D 43

**Q15: **

Is 96 a prime number?

- Ano
- Byes

**Q16: **

Are the numbers 37, 97, and 75 prime numbers?

- Ano
- Byes

**Q17: **

Which of the following is not a prime number?

- A2
- B23
- C73
- D68

**Q18: **

Find a prime number between 37 and 46.

- A 53
- B 39
- C 31
- D 43

**Q19: **

Look at these numbers.

How many of these numbers are prime?

Which is the largest prime number?

Which is the smallest composite number?

**Q20: **

State two prime numbers that are greater than 15 and less than 95.

- A45, 61
- B44, 60
- C42, 58
- D43, 59

**Q21: **

All odd numbers greater than 7 can be expressed as the sum of three prime numbers. Which three prime numbers have a sum of 97?

- A17, 18, 62
- B16, 20, 61
- C18, 19, 60
- D17, 19, 61

**Q22: **

Find the smallest prime number that is greater than 40.