MATH HW 1 LEVEL 1

State whether the following numbers are prime or composite:

1. 8_______________                          

2. 23_______________                 

3. 4_______________                      

4. 36________________                

5. 12_______________                       

6. 29_________________      

Write the prime factorization for 36.

                             

What are ALL the factors of 24?

1. 1, 2, 3, 4, 6, 8, 12, 24
2. 1, 24
3. 1, 5, 6, 7, 11
4. 2, 4, 6, 8, 10, 12

What are ALL the factors in the number 15?

1. 1, 2, 3, 5, 10, 15
2. 5, 10, 15
3. 1, 3, 5, 15
4. 1, 15

What is the prime factorization for 260?

1. 2×2×5×13
2. 2×2×65
3. 2×10×13
4. 2×5×26

Which choice is NOT a factor of 40?

1. 20
2. 8
3. 10
4. 3

Is the number 60 prime or composite?

1. prime
2. composite

List the prime factorization of 24:

1. 2×2×2×3
2. 3×2×4
3. 3×8
4. 12×2

79 is a prime number.

1. True
2. False

Which set represents 4 multiples of 8?

1. 14, 21, 28, 35
2. 18, 27, 36, 45
3. 16, 24, 32, 40
4. 12, 18, 24, 30

 Is 17 a prime or composite number?        _________________

147 is a prime number.

1. True
2. False

A prime number is

1. a number which has many factors.
2. a number whose only factors are 1 and itself.
3. always an odd number.
4. a number that comes first.

Find the least common multiple of 5 and 30.

1. 5
2. 10
3. 15
4. 30