prime and composite numbers

1. Which definition best describes a composite number?

• Only odd Numbers

• Only even numbers

• A number that has factors other than 1 and itself

• A number greater than 1 that only has factors of 1 and itself

2. This number is ________

• fraction number

• even number

• prime number

• composite number

3. When you have some numbers between 21 - 27, which numbers are prime numbers?

• 23

• 21, 22, 26

• 23, 24, 25, 26

• 21, 23, 25, 26, 27

4. Lala has some numbers. The numbers are from 31 - 40. She tries to make a prime number of groups. What numbers are there?

• 31, 33, 35, 37, 39

• 32, 33, 34, 35

• 31, 37

• 37

5. Is this a prime number?

• True

• False

6. Lili had some numbers. Will you help her to add all the numbers? Then choose which is the correct answer?

• 80, composite number

• 71, prime number

• 60, composite number

• 53, composite number

7. What are the factors of 12?

• 1,2,3, 4, 12

• 1, 3, 4, 6, 12

• 1, 2, 3, 4 , 6, 12

• All in correct

8. What are the factors of 25?

• 1, 2, 3, 5, 25

• 1, 3, 5, 25

• 1, 5, 25

• 1, 25

9. Mr. Kalif has some numbers above. When he subtracts all numbers, what is the correct answer? Then is the result a prime number or composite number?

• 51, composite number

• 49, composite number

• 41, prime number

• 53, prime number

10. Identify some prime numbers based on the box!

• 1, 3, 7, 11, 13, 15

• 1, 3, 6, 10, 19, 25

• 1, 3, 7, 11, 19, 23

• 1, 6, 7, 9, 11, 19, 25