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GCF
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100

52

5 x 5 = 25

100

5 x 4 + 3 - 8

5 x 4 + 3 - 8 

20 + 3 - 8

23 - 8 

15

100

What is the GCF of 5 and 25

Factors of 5                      Factors of 25

1        5                             1             25

                                         5              5 

GCF: 5


100

What is the least common multiple of 2 and 6? 

2: 2, 4, 6

6: 6

LCM: 6

100
Is 144 a perfect square? 
yes, 122
200

53

5 x 5 x 5 = 125

200

4 x 8 / 2

4 x 8 / 2 

32 / 2

16

200

What is the GCF of 12 and 15?

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

Factors of 15: 1, 15, 3, 5 


GCF: 3

200

What is the LCM of 3 and 4?

3: 3, 6, 9, 12

4: 4, 8, 12

LCM: 12


200

What is the GCF of 36 and 60?

Factors of 36: 1, 36, 2, 18, 3, 12, 4, 9, 6, 6

Factors of 60: 1, 60, 2, 30, 3, 20, 4, 15, 5, 12, 6, 10

GCF: 12

300

Is 49 a perfect square? 

Yes! 72

300

(7-5) + 2 x 9

(7-5) + 2 x 9 

2 + 2 x 9 

2 + 18

20

300

What is the GCF of 18 and 20?

Factors of 18: 1, 18, 2, 9, 3, 6

Factors of 20: 1, 20, 2, 10, 4, 5, 


GCF: 2

300

What is the LCM of 24 and 32?

24: 24, 48, 72, 96

32: 32, 64, 96

LCM: 96

300

3 x 5 + 10 / 2

3 x 5 + 10 / 2

15 + 10 / 2

15 + 5 

20 

400

63

6 x 6 x 6 = 216

400

52 x 3 + (12 - 6)

52 x 3 + (12 - 6)

52 x 3 + 6

25 x 3 + 6

75 + 6 

81

400

What is the GCF of 32 and 56? 

Factors of 32: 1, 32, 2, 16, 4, 8, 

Factors of 56: 1, 56, 2, 28, 4, 14, 7, 8 


GCF: 8

400
What is the LCM of 5, 10, 15? 

5: 5, 10, 15, 20, 25, 30

10: 10, 20, 30

15: 15, 30

LCM: 30

400

Is 121 a perfect square? 

Yes, 112

500

94

9 x 9 x 9 x 9 = 6,561

500

32 + 24 - 9

32 + 24 - 9

9 + 16 - 9

25 - 9 

16

500

What is the GCF of 12, 20, and 48?

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

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

Factors of 48: 1, 48, 2, 24, 3, 16, 4, 12, 6, 8


GCF: 4

500

What is the LCM of 2, 3, and 5? 

2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30

3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30

5: 5, 10, 15, 20, 25, 30

LCM: 30

500

(3 x 4 ) - (2 / 2) + 32

(3 x 4) - (2 / 2) + 32

(12) - (1) + 32

(12) - (1) + 9

11 + 9

20