Factors and Multiples

Factors

100

What are the factors of the number 20?

1, 2, 4, 5, 10, 20

200

True or False: 4 is a factor of 48.

True

300

What are the factors of the number 72?

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

400

What are the factors of 130?

1,2,5,10,13,26,65, 130

500

What is the HCF of 81, 108, 135

27

Multiples

100

Find the first 3 multiples of the number 20.

20, 40, 60...

200

What is a MULTIPLE?

Multiples are the numbers we find when we SKIP COUNT.

Multiples are the numbers you get when you multiply a certain number by an integer

300

True or False: 4 is a multiple of 20.

FALSE. 4 is a FACTOR of 20.

400

Find the 11th to 14th multiple of 19.

209, 228,247,266

500

What is the LCM of 28, 44, and 132?

The LCM of 28, 44, and 132 is 924.

Prime/Composite?

100

Prime or Composite: 28

28 is COMPOSITE (factors = 1, 2, 4, 7, 14, 28)

200

Prime or Composite: 2039

23 is PRIME (Factors = 1, 2039)

300

What is a PRIME number?

A prime number has only 2 factors, 1 and itself

400

Prime or Composite: 33

33 is composite (factors = 1, 3, 11, 33)

500

The ONLY even prime number is ______

2

Prime Factorization

100

What is the prime factored form of 46

46 = (2)(23)

200

What is the prime factored form of 972?

972 = (2 ² )⋅( 3 ⁵)

300

What is the prime factored form of 16900?

38025 = (2²)(5²)(13²)

400

What is the prime-power factorization of 4620?

4620 = 2 ² ⋅ 3 ⋅ 5 ⋅ 7⋅ 11

500

What is the prime-power factorization form of 845

845 = (5)(13²)

LCM and HCF

100

What is the HCF of 42, 48, and 54?

HCF is 6

200

What is LCM of 16, 18, and 24?

284 x 7 = 1988

300

What are the HCF and LCM of 8, 18, and 26?

HCF = 2, LCM = 936

400

What are the HCF and LCM of 336 and 54?

HCF is 6 LCM is 3024

500

Find the H.C.F. and L.C.M. of the following pairs of numbers. 145 and 232

HCF =29 LCM 1160