Factors,Multiples and more

Factors

100

Cual de los siguientes es un factor de 12?

a) 7

b) 24

c) 4

d) 10

c) 4

200

Encuentra los factores de 25.

1, 5, 25

300

Encuentra los factores de 40.

1, 2, 4, 5, 8, 10 ,20 , 40

400

5 es un factor de 36?

Verdad o Falso?

FALSO

Factors of 36 are:

1, 2, 3, 4, 6, 9, 12, 18, 36

500

Is 10 a factor of 48?

No

1, 2, 3, 4, 6, 8, 12, 16, 24, 48

GCF

100

What does GCF represent?

Greatest common factor 

200

What is the GCF of 12 and 20?

GCF = 4

Factors of 12 - 1, 2, 3, 4, 6, 12

Factors of 20 - 1, 2, 4, 5, 10, 20

Common factors - 1, 2, 4

300

What is the GCF of 10 and 15?

GCF = 5

Factors of 10 - 1, 2, 5, 10

Factors of 15 - 1, 3, 5, 15c

Common factors - 1, 5

400

What is the GCF of 24 and 30?

GCF = 6

Factors of 24 - 1, 2, 3, 4, 6, 8, 12, 24

Factors of 30 - 1, 2, 3, 5, 6, 10, 15, 30

Common factors - 1, 2, 3, 6

500

What is the GCF of 25 and 45?

GCF = 5

Factors of 25 - 1, 5, 25

Factors of 45 - 1, 3, 5, 9, 15, 45

Common factors - 1, 5

Prime and Composite

100

What is a prime number?

What is a composite number?

A prime number has 1 set of factors - 1 x itself.

A composite number has more than one factor pair. (many factors)

200

Is the number prime or composite? 

2

prime 

300

Is the number prime or composite? 

4

Composite.  

400

Is the number prime or composite?  Why?

20

Composite - has many factors

500

Is the number prime or composite?

11

Prime - only has 1 factor pair - 1 x 11

Multiples

100

Cual de los siguientes es un múltiplo de 7?

a) 18

b) 1

c) 42

d) 48

c) 42

200

Encuentra los primeros 10 multiplos de 2.

2, 4, 6, 8, 10, 12, 14, 16, 18, 20 

300

6 es un múltiplo de 3? Por que o por que no?

Si porque los multiplos de 3 son:

3, 6, 9, 12, 15...

400

Find the first 8 multiples of 9.

9, 18, 27, 36, 45, 54, 63, 72, 

500

Is 81 a multiple of 8?  Why or why not?

No because if you do the multiples of 8, you won't find 81.

8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88

LCM

100

What does LCM represent?

least common multiple

200

What is the LCM of the numbers 6 and 8?

LCM = 24

Multiples of 6 - 6, 12, 18, 24, 30, 36, 42, 48

Multiples of 8 - 8, 16, 24...don't have to go any further ...lcm is 24.

300

What is the LCM of 5 and 10?

LCM = 10

Multiples of 5 - 5, 10, 15, 20,

Multiples of 10 - 10, 20, 30

400

What is the LCM of 3 and 9?

LCM = 9

Multiples of 3 - 3, 6, 9, 12, 15

Multiples of 9 - 9, 18, 27, 36, 45

500

What is the LCM of 12 and 20?

LCM = 60

Multiples of 12 - 12, 24, 36, 48, 60, 72, 84, 96

Multiples of 20 - 20, 40, 60