Free Printable GCF and LCM

1.

Find the LCM of 12 and 15

a)

30

b)

45

c)

60

d)

90

2.

Find the GCF of 100 and 125

a)

20

b)

25

c)

15

d)

10

3.

Find the GCF of 90 and 120

a)

30

b)

60

c)

15

d)

45

4.

Find the GCF of 60 and 75

a)

15

b)

5

c)

10

d)

20

5.

Find the GCF of 45 and 60

a)

15

b)

5

c)

10

d)

20

6.

Find the GCF of 80 and 120

a)

40

b)

20

c)

10

d)

30

7.

Find the GCF of 36 and 48

a)

12

b)

6

c)

18

d)

24

8.

Find the GCF of 18 and 24

a)

2

b)

6

c)

12

d)

18

9.

Find the LCM of 8 and 10

a)

20

b)

30

c)

40

d)

80

10.

Find the GCF of 21 and 28

a)

1

b)

7

c)

14

d)

21

11.

Find the LCM of 5 and 7

a)

12

b)

24

c)

35

d)

70

12.

Find the GCF of 16 and 24

a)

2

b)

4

c)

8

d)

16

13.

Find the LCM of 18 and 24

a)

36

b)

42

c)

72

d)

48

14.

Find the GCF of 80 and 100

a)

20

b)

10

c)

30

d)

40

15.

Find the LCM of 8 and 12

a)

24

b)

36

c)

48

d)

96

16.

Find the GCF of 45 and 60

a)

15

b)

5

c)

30

d)

20

17.

Find the GCF of 18 and 27

a)

3

b)

9

c)

6

d)

18

18.

Find the GCF of 27 and 36

a)

3

b)

9

c)

12

d)

18

19.

Find the LCM of 12 and 15

a)

30

b)

60

c)

90

d)

120

20.

Find the GCF of 18 and 27

a)

3

b)

6

c)

9

d)

18

21.

Find the GCF of 35 and 70

a)

35

b)

5

c)

10

d)

20

22.

Find the GCF of 100 and 150

a)

50

b)

25

c)

10

d)

30

23.

Find the LCM of 18 and 24

a)

36

b)

42

c)

72

d)

90

24.

Find the GCF of 36 and 48

a)

6

b)

12

c)

18

d)

24

25.

Find the LCM of 15 and 25

a)

75

b)

50

c)

100

d)

125

26.

Find the GCF of 36 and 48

a)

12

b)

6

c)

18

d)

24

27.

Find the GCF of 24 and 36

a)

6

b)

12

c)

18

d)

24

28.

Find the LCM of 15 and 25

a)

75

b)

100

c)

125

d)

150

29.

Find the GCF of 36 and 48

a)

6

b)

12

c)

18

d)

24

30.

Find the LCM of 15 and 25

a)

75

b)

100

c)

125

d)

150

31.

Find the GCF of 45 and 60

a)

15

b)

30

c)

5

d)

20

32.

Find the LCM of 6 and 8

a)

12

b)

24

c)

48

d)

72

33.

Find the GCF of 50 and 75

a)

5

b)

10

c)

15

d)

25

34.

Find the LCM of 15 and 25

a)

75

b)

50

c)

100

d)

125

35.

Find the GCF of 45 and 60

a)

5

b)

15

c)

10

d)

20

36.

Find the LCM of 9 and 15

a)

45

b)

30

c)

60

d)

90

37.

Find the LCM of 12 and 18

a)

36

b)

72

c)

54

d)

90

38.

Find the GCF of 36 and 48

a)

12

b)

24

c)

6

d)

18

39.

Find the GCF of 45 and 60

a)

5

b)

10

c)

15

d)

20

40.

Find the LCM of 12 and 20

a)

40

b)

60

c)

80

d)

100

41.

Find the GCF of 80 and 120

a)

20

b)

40

c)

60

d)

80

42.

Find the LCM of 18 and 24

a)

36

b)

72

c)

108

d)

144

43.

Find the LCM of 12 and 6.

a)

6

b)

12

c)

2

d)

1

44.

51 is a _____________ of 3

a)

Factor

b)

Multiple

45.

What is the GCF of 18 and 24?

a)

3

b)

6

c)

8

d)

9

46.

What is the least common multiple (LCM) of 4 and 10?

a)

4

b)

40

c)

15

d)

20

47.

Two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again?

a)

48 seconds

b)

45 seconds

c)

16 seconds

d)

8 seconds

48.

18 ____________ a factor of 9.

a)

is

b)

is not

49.

Which pair of numbers has a GCF of 10 AND a LCM of 60?

a)

2 and 5

b)

20 and 30

c)

5 and 10

d)

15 and 20

50.

There are 14 girls and 21 boys in Mrs. Andrew's gym class. To play a certain game, the students must form teams. Each team must have the same number of boys and girls. What is the greatest number of teams Mrs. Andrews can make if every student is on a team?

a)

7 teams

b)

14 teams

c)

21 teams

d)

42 teams

51.

LCM (9, 12)

a)

9

b)

36

c)

12

d)

3

52.

Find the GCF of 64 and 144

a)

8

b)

6

c)

16

d)

2

53.

Which of these is a factor of 10?

a)

2

b)

4

c)

20

d)

6

54.

Which is not a factor of 12?

a)

3

b)

6

c)

24

d)

4

55.

Which of the following is a multiple of 7?

a)

14

b)

17

c)

22

d)

1

56.

Which of the following is not a multiple of 9?

a)

9

b)

19

c)

90

d)

18

57.

What is the GCF of 18 and 24?

a)

3

b)

6

c)

8

d)

9

58.

What is the least common multiple (LCM) of 4 and 10?

a)

4

b)

40

c)

15

d)

20

59.

Find the LCM of 12 and 6.

a)

6

b)

12

c)

2

d)

1

60.

Which is the GCF of 4 and 12?

a)

2

b)

4

c)

12

d)

24

61.

Which pair of numbers has a LCM of 20?

a)

4 and 5

b)

2 and 10

c)

5 and 10

d)

4 and 6

62.

GCF of:
14 and 20

a)

7

b)

28

c)

2

d)

6

63.

Find the LCM of 18 and 24

a)

6

b)

72

c)

24

d)

5

64.

What is the least common multiple (LCM) of 8 and 5?

a)

50

b)

40

c)

5

d)

8

65.

GCF 24 and 36

a)

8

b)

6

c)

12

d)

4

66.

What is the GCF (Greatest Common Factor) of 12 and 6?

a)

1

b)

6

c)

2

d)

3

67.

What is the GCF of 56 and 49?

a)

14

b)

2

c)

8

d)

7

68.

The lights on a halloween decorations blink at different times. The ghost blinks every 7 seconds and the pumpkin blinks every 5 seconds. When will they blink at the same time?

a)

15 seconds

b)

20 seconds

c)

12 seconds

d)

35 seconds

69.

30 sixth grade students and 36 seventh grade students go on a field trip. They need to be split up into even groups. What is the largest number of groups that can be made with the same number kids in each group?

a)

2 groups

b)

3 groups

c)

6 groups

d)

9 groups

70.

Marco has 36 roses and 45 tulips. He wants to make flower arrangements so each arrangement will have the same number of tulips and roses. Which expression represents the largest number of arrangements he can make and the number of flowers in each arrangement?

a)

3 (12 + 15)

b)

9 x 9

c)

5 (6 + 9)

d)

9 (4 + 5)

71.

Callie works out every 4 days and Kyle works out every 3 days. Callie and Kyel both exercised today. How many days in the next 45 days will they both be exercising on the same day?

a)

2

b)

12

c)

3

d)

24

72.

What is the LCM of 5, 8, and 10

a)

20

b)

40

c)

60

d)

80

73.

GCF of 24 and 56

a)

2

b)

4

c)

6

d)

8

74.

Jane has 18 juice boxes, 24 bags of peanuts and 36 apples. She wants to make snack bags with the same number of each thing in each bag. What is the greatest number of snack bags Jane can make.

a)

4

b)

6

c)

8

d)

10

75.

Find the GCF of 64 and 144

a)

8

b)

6

c)

16

d)

2

76.

Find the Least Common Multiple (LCM) of 4 & 14.

a)

14

b)

20

c)

28

d)

42

77.

Find the Least Common Multiple (LCM) of 12 & 30

a)

30

b)

36

c)

60

d)

90

78.

Find the Least Common Multiple (LCM) of 12 & 18

a)

36

b)

48

c)

60

d)

72

79.

The school cafeteria serves tacos every sixth day and cheeseburgers every eight day. If tacos and cheeseburgers are both on today’s menu, how many days will it be before they are both on the menu again?

a)

14 days

b)

24 days

c)

34 days

d)

44 days

80.

Two clocks are turned on at the same time. One clock chimes every 15 minutes. The other clock chimes every 25 minutes. In how many minutes will they chime together?

a)

55 minutes

b)

25 minutes

c)

60 minutes

d)

75 minutes

81.

Henry and Margo both began traveling around a circular track. Henry is riding his bike, and Margo is walking. It takes Henry 7 minutes to make it all the way around, and Margo takes 12 minutes. How much time will pass until they meet at the starting line?

a)

84 minutes

b)

48 minutes

c)

854 minutes

d)

78 minutes

82.

There are 48 girls and 64 boys.
The choir teacher plans to arrange the students in equal rows.
Only girls or boys will be in each row (no mixing of girls and boys in the same row). What is the greatest number of students that could be in each row?

a)

8

b)

6

c)

16

d)

12

83.

Prime numbers have:

a)

Exactly 2 factors

b)

2 pairs of factors

c)

More than 2 factors

d)

1 factor

84.

Find the Least Common Multiple (LCM) of 12 & 30

a)

30

b)

36

c)

60

d)

90

85.

Is 5 prime or composite?

a)

Prime

b)

Composite

86.

All of these are prime except

a)

3

b)

9

c)

2

d)

13

87.

A composite number

a)

has more than 2 factors

b)

has one factor

c)

has at least 10 factors

d)

is always a really big number

88.

List all the factors of 12

a)

1, 2, 3, 4, 6, 12

b)

1, 2, 4, 12

c)

1, 12

d)

1, 2, 3, 4, 5, 6, 12

89.

GCF of:
14 and 20

a)

7

b)

28

c)

2

d)

6

90.

LCM of:
5 and 8

a)

20

b)

40

c)

5

d)

8

91.

LCM of:
10 and 5

a)

5

b)

10

c)

15

d)

50

92.

GCF of:
5 and 7

a)

1

b)

3

c)

5

d)

7

93.

LCM of:
6 and 9

a)

3

b)

12

c)

24

d)

36

94.

LCM of:
6 and 9

a)

3

b)

12

c)

24

d)

36

95.

LCM of:
15 and 20

a)

5

b)

45

c)

60

d)

300

96.

Sara had 16 red flowers and 24 yellow flowers. She wants to make bouquets with the same number of each color flower in each bouquet. What is the greatest number of bouquets that she can make?

a)

4

b)

2

c)

48

d)

8

97.

List all the factors of 12

a)

1, 2, 3, 4, 6, 12

b)

1, 2, 4, 12

c)

1, 12

d)

1, 2, 3, 4, 5, 6, 12

98.

Two clocks are turned on at the same time. One clock chimes every 15 minutes. The other clock chimes every 25 minutes. In how many minutes will they chime together?

a)

55 minutes

b)

25 minutes

c)

60 minutes

d)

75 minutes

99.

What are the factors of 25?

a)

1, 2, 3, 5, 10, 15, 25

b)

1, 5, 25

c)

1, 25

d)

1, 5

100.

Is this question asking to find GCF or LCM?

a)

GCF

b)

LCM

101.

Peter has 18 oranges and 27 pears. He wants to make fruit baskets with the same number of each fruit in each basket. What is the greatest number of fruit baskets he can make?

a)

1

b)

2

c)

3

d)

4

102.

Peter has 18 oranges and 27 pears. He wants to make fruit baskets with the same number of each fruit in each basket. How many PEARS will be in the greatest number of fruit baskets?

a)

7

b)

8

c)

9

d)

10

103.

Is this question asking to find GCF or LCM?

a)

GCF

b)

LCM

104.

Find the GCF of 64 and 144.
Hint-Remember to use your factor trees to help you.

a)

8

b)

6

c)

16

d)

2

105.

Using a Factor Tree, find the prime factorization of 48 in expanded form.

a)

2 x 12 x 12

b)

2 x 2 x 2 x 2 x 3 x 3 x 5

c)

2 x 2 x 2 x 2 x 3

d)

7 x 7 x 7

106.

Which pair of numbers has a GCF of 5?

a)

10 and 25

b)

30 and 40

c)

45 and 9

d)

50 and 25

107.

Is 35 prime or composite?

a)

prime

b)

composite

108.

What is the least common multiple (LCM) of 4 and 10?

a)

4

b)

40

c)

15

d)

20

109.

Which of these is a factor of 10?

a)

2

b)

4

c)

20

110.

Which is not a factor of 12?

a)

3

b)

6

c)

24

111.

Which is the GCF of 4 and 12?

a)

2

b)

4

c)

12

112.

Bill cut out 6 squares and 8 circles. He divided the cutouts into groups so that the same number of squares and circles were in each group. What is the greatest number of groups he could have made?

a)

2

b)

3

c)

4

113.

Which of the following is a multiple of 7?

a)

14

b)

17

c)

22

114.

Which of the following is not a multiple of 9?

a)

9

b)

19

c)

90

115.

Every third visitor to a museum gets a free bumper sticker. Every fifth visitor to that museum gets a free key chain. Which visitor each day will be the first one to get both the bumper sticker and the key chain?

a)

3rd

b)

5th

c)

15th

116.

Gabriella volunteers at the hospital every 4th day. She volunteers at the food pantry every 6th day. She volunteered at the hospital and the food pantry both on March 31. On what date will she next volunteer at both?

a)

April 12

b)

April 16

c)

May 1

117.

Which pair of numbers has a GCF of 6?

a)

3 and 18

b)

6 and 12

c)

12 and 24

118.

Which pair of numbers has a LCM of 20?

a)

4 and 5

b)

2 and 10

c)

5 and 10

119.

6 _________ a multiple of 2.

a)

is

b)

is not

120.

18 ____________ a factor of 9.

a)

is

b)

is not

121.

Which pair of numbers has a GCF of 10 AND a LCM of 60?

a)

2 and 5

b)

20 and 30

c)

5 and 10

d)

15 and 20

122.

A prime number is:

a)

A number that is made only by multiplying 1 and itself.

b)

An odd number.

c)

A popular number.

d)

The least common multiple of two numbers.

123.

There are 14 girls and 21 boys in Mrs. Andrew's gym class. To play a certain game, the students must form teams. Each team must have the same number of boys and girls. What is the greatest number of teams Mrs. Andrews can make if every student is on a team?

a)

7 teams

b)

14 teams

c)

21 teams

d)

42 teams

124.

As 100 students entered the auditorium some were given a prize. If every 6th student received a pencil and every 9th student received a notebook. How many participants received both a pencil and a notebook?

a)

3 students

b)

18 students

c)

5 students

d)

54 students

125.

Mrs. McCoy makes flower arrangements. She has 36 red carnations, 60 white carnations, and 72 pink carnations. Each arrangement must have the same number of each color. What is the greatest number of arrangements she can make if she uses every carnation?

a)

12 flowers

b)

12 arrangements

c)

1,080 arrangements

d)

6 arrangements

126.

Find the Greatest Common Factor (GCF) of 14 & 22.

a)

1

b)

2

c)

7

d)

14

127.

Find the Greatest Common Factor (GCF) OF 32 and 64.

a)

1

b)

2

c)

4

d)

32

128.

Karen has 30 photos from a trip to Dallas and 48 photos from a trip to Austin. She wants to put all the photos in an album so that the photos from each trip are in separate sections. What is the greatest number of photos she can put on each page?

a)

18 photos

b)

6 photos

c)

240 photos

129.

What is the prime factorization of 24?

a)

3 x 8

b)

3 x 2 x 2 x 2

c)

4 x 6

d)

2 x 2 x 3

130.

The greatest common factor of 10, 30, and 45 is (a) .

131.

What is the greatest common factor of 28, 70, and 42?

a)

14

b)

7

c)

28

d)

6

132.

Lisa is making identical flower arrangements for wedding reception. She has 32 white roses, 24 pink roses, and 16 bunches of babies breath. She wants each arrangement to have the same number of each flower. What is the greatest number of arrangements that she can make if every flower is used?

a)

6

b)

2

c)

4

d)

8

133.

What is the greatest common factor of 15 and 36?

a)

6

b)

8

c)

4

d)

3

134.

The Greatest Common Factor of two prime numbers is......

a)

themselves

b)

There are no common factors.

c)

1

d)

0

135.

Which of these numbers is a multiple of 18?

a)

2

b)

6

c)

35

d)

54

136.

What is the LCM of 2, 4, and 9?

a)

18

b)

36

c)

27

d)

40

137.

John and Mitchell are both building a race track out of connecting pieces. John has pieces that are 20 inches long while Mitchell's pieces are 8 inches long. How long will the shortest track be that they can each build with the same length?

a)

2 inches

b)

40 inches

c)

4 inches

d)

20 inches

138.

Tonya needs to buy red paper plates and napkins for a party. Plates are sold in packages of 10 and napkins are sold in packages of 14. What is the least number of plates and napkins that Tonya can buy so that there is the same amount of plates and napkins?

a)

140

b)

2

c)

70

d)

40

139.

Jamie has 48 notebooks and 36 pencils. He wants to make packages to send to his cousins. Each package must have the same number of notebooks and pencils. What is the greatest number of packages that Jamie could make?

a)

4

b)

9

c)

12

d)

2

140.

There are 9 cards in each box and 6 envelopes in each package. How many cards and envelopes will I have to buy so I am buying the same amount?

(a)

141.

There are 9 cards in each box and 6 envelopes in each package. How many BOXES OF CARDS will I have to buy so I have the same amount of cards and envelopes?

(a)

142.

There are 9 cards in each box and 6 envelopes in each package. How many PACKAGES OF ENVELOPES will I have to buy so I have the same amount of both?

(a)

143.

List all the factors of 54, separated by commas.

(a)

144.

Find the LCM of 18 and 24

a)

48

b)

36

c)

72

d)

432

145.

John works every 4 days. Chris works every 7 days. How many days until they work together again?

a)

28

b)

11

c)

3

d)

35

146.

Jane has 18 juice boxes, 24 bags of peanuts and 36 apples. She wants to make snack bags with the same number of each thing in each bag. What is the greatest number of snack bags Jane can make.

a)

4

b)

6

c)

8

d)

10

147.

What is the GCF of 72, 96, and 84?

a)

2

b)

7

c)

12

d)

4

148.

Pencils come in packs of 8 and highlighters in packs of 12.

What is the least number of pencils and highlighters you need to buy for an equal amount?

a)

4

b)

48

c)

24

149.

You have 18 red legos and 24 green legos. You need to combine them into groups of the same size with the same number of red and green legos in each group.
A. What is the greatest number of groups you can make?
B. How many red and green legos will be in each group?

a)

A. 6 groups B. 3 red and 4 green

b)

A. 72 groups B. 6 red and 3 green

c)

A. 3 groups B. 6 red and 8 green

150.

Jenny goes to dance class every 6 days and karate class every 9 days. If she did both today, in how many days will she do both again?

a)

18 days

b)

24 days

c)

36 days

d)

54 days

151.

The pet shop is putting together goody bags to send to different shelters. They have 36 chew toys, 24 dog bones and 18 chase toys for cats. What is the maximum number of goody bags will they be able to make to send to shelters?

a)

4 bags

b)

8 bags

c)

6 bags

d)

12 bags

152.

Which of the following is a multiple of 8?

a)

8

b)

2

c)

4

d)

100

153.

What is the least common multiple (LCM) of 8 and 5?

a)

50

b)

40

c)

5

d)

8

154.

Fill in the missing multiple.
3: 3, 6, 9, ___, 15, 18, 21

a)

10

b)

11

c)

12

d)

13

155.

Joe has listed the first 4 multiples of 7 as:
7 14 22 28
Which one is incorrect?

a)

7

b)

14

c)

22

d)

28

156.

List all the factors of 18

a)

1, 6, 9, 18

b)

1, 2, 3, 4, 18

c)

1, 2, 3, 6, 9, 18

d)

2, 6, 9, 18

157.

What is the GCF of 24 and 40?

a)

1

b)

2

c)

4

d)

8

158.

Lisa is making activity baskets to donate to charity. She has 12 coloring books and 36 crayons. What is the greatest number of baskets she can make if each type of toy is equally distributed among the baskets?

a)

2

b)

12

c)

36

d)

6

159.

Ian goes hiking every 4 days and swimming every 6 days. He did both kinds of exercise today. How many days from now will he go both hiking and swimming again?

a)

2 days

b)

12 days

c)

24 days

d)

48 days

160.

Peter has 18 oranges and 27 pears. He wants to make fruit baskets with the same number of each fruit in each basket. What is the greatest number of baskets he can make?

a)

3

b)

18

c)

9

d)

27

161.

At Kentucky Fried Chicken, the kitchen staff baked 96 chicken legs and 144 thighs. The staff had to prepare platters for an office lunch. If each platter will have the same number of legs and thighs, what is the greatest number of platters they can make?

a)

48

b)

2

c)

4

d)

16

162.

Jeremy has two pieces of wood: one is 90 inches and the other is 72 inches. He wants to cut both pieces into smaller pieces of the same length. What is the longest possible length he can cut and not have any lumber left over?

a)

9

b)

2

c)

18

d)

72

163.

Shannon is making identical balloon arrangements for a party. She has 32 maroon balloons, 24 white

balloons, and 16 orange balloons. She wants each arrangement to have the same number of each

color. What is the greatest number of arrangements that she can make if every balloon is used?

a)

6

b)

2

c)

4

d)

8

164.

There are 40 girls and 32 boys who want to participate in 6th grade intramurals. If each team must

have the same number of girls and the same number of boys. What is the greatest number of teams that can participate in intramurals?

a)

6

b)

4

c)

8

d)

2

165.

There are 48 girls and 64 boys.
The choir teacher plans to arrange the students in equal rows.
Only girls or boys will be in each row (no mixing of girls and boys in the same row). What is the greatest number of students that could be in each row?

a)

8

b)

6

c)

16

d)

12

166.

Kiara baked 30 oatmeal cookies and 48 chocolate chip cookies to package in plastic containers
for her teacher friends at school. She wants to divide the cookies into identical containers so that each
container has the same number of each kind of cookie. If she wants each container to have the
greatest number of cookies possible, how many plastic containers does she need?

a)

2

b)

4

c)

6

d)

8

167.

Melanie has pieces of train track that are 8 inches long that she is connecting together to form a track that her train can travel on. Martin is also trying to construct a track for his train but is using track pieces that are 20 inches long. How long will the shortest track be if the track that Melanie builds ends up being the same length as Martin’s track?

a)

10 inches

b)

20 inches

c)

30 inches

d)

40 inches

168.

At the movie theater, they give out a free drink to every 75th customer and a free bag of popcorn to every 30th customer. Who is the first customer that is going to win both free items?

a)

16th customer

b)

150th customer

c)

300th customer

d)

180th customer

169.

Henry and Margo both began traveling around a circular track. Henry is riding his bike, and Margo is walking. It takes Henry 7 minutes to make it all the way around, and Margo takes 12 minutes. How much time will pass until they meet at the starting line?

a)

84 minutes

b)

48 minutes

c)

854 minutes

d)

78 minutes

170.

What is the least common multiple of 16 and 24?

a)

36

b)

46

c)

48

d)

24

171.

What is the least common multiple of 13 and 39?

a)

52

b)

39

c)

45

d)

24

172.

What is the least common multiple of 18 and 24?

a)

6

b)

72

c)

24

d)

5

173.

What is the least common multiple of 9 and 12?

a)

9

b)

36

c)

12

d)

3

174.

What is the great common factor of 56 and 49?

a)

14

b)

2

c)

8

d)

7

175.

What is the great common factor of 24 and 36?

a)

8

b)

6

c)

12

d)

4

176.

What is the great common factor of 14 and 20?

a)

7

b)

28

c)

2

d)

6

177.

What is the great common factor of 4 and 12?

a)

2

b)

4

c)

12

178.

Carlos has 36 tomato plants and 81 pepper plants to place in rows. Each row must have the same number of each plant and he must have no plants left over. What is the largest number of rows Carlos can make?

a)

At most, he can make 6 rows.

b)

At most, he can make 8 rows

c)

At most, he can make 9 rows.

d)

At most, he can make 12 rows.

179.

There are 40 girls and 32 boys who want to participate in 6th grade intramurals. If each team must have the same number of girls and the same number of boys. What is the greatest number of teams that can participate in intramurals?

a)

6

b)

4

c)

8

d)

2

180.

Sara had 16 red flowers and 24 yellow flowers. She wants to make bouquets with the same number of each color flower in each bouquet. What is the greatest number of bouquets that she can make?

a)

4

b)

2

c)

48

d)

8

181.

Lisa is making activity baskets to donate to charity. She has 12 coloring books and 36 crayons. What is the greatest number of baskets she can make if each type of toy is equally distributed among the baskets?

a)

2

b)

12

c)

36

d)

6

182.

The Ferry's wheel at an amusement park runs every 30 minutes, and the roller coaster operates every 25 minutes. if the two rides are running now, how many hours will it take for them to be running together at the same time again?

a)

50 minutes

b)

75 minutes

c)

125 minutes

d)

150 minutes

183.

Beginning at 8:30 AM, tours of the National Capitol and the White House begin at a tour agency. Tours for the National Capitol leave every 15 minutes. Tours for the White House leave every 20 minutes. How often do the tours leave at the same time?

a)

Every 15 minutes

b)

Every 30 minutes

c)

Every 45 minutes

d)

Every 60 minutes

184.

Two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again?

a)

48 seconds

b)

45 seconds

c)

16 seconds

d)

8 seconds

185.

The school cafeteria serves tacos every 6th day and cheeseburgers every 8th day. If tacos and cheeseburgers are both on today’s menu, how many days will it be before they are both on the menu again?

a)

24 days

b)

2 days

c)

48 days

d)

12 days

186.

Determine whether the following statement about 14 and 60 is True or False.

The greatest common factor is 2.

a)

True

b)

False

187.

Determine whether the following statement about 14 and 60 is True or False.

A common factor is 7.

a)

True

b)

False

188.

Determine whether the following statement about 14 and 60 is True or False.

The least common multiple is 840.

a)

True

b)

False

189.

Determine whether the following statement about 14 and 60 is True or False.

A common multiple is 420.

a)

True

b)

False

GCF and LCM

Total questions: 189

Worksheet time: 12hrs 44mins

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