Greatest Common Factor and Least Common Multiple

Lori wants to buy the same number of pencils and pens for school this year. Pencils comes in packs of 16 and pens come in packs of 4. What is the least number of packs of each sh could buy?

1 of 16 packs and 4 of 4 pen packs

What is the GCF of 14 and 28? 2 4 6 8 10 12 14 16 18 20 22 24 26 28 7 14 21 28 14 28 28 GCF is: 1, 2, 7, 14, and 28

14

What is the GCF of 42 and 63? 42 7 63 21

21

What is LCM 4, 8, or 12? 4 8 24 32

24

A publisher wants to ship the same number of books and magazines to one of its outlets. Books come in boxes of 12 and magazines come in boxes of 36. What is the least number of boxes that can be shipped? 1 box books and 1 box mg 1 box books and 3 box mg 3 boxes books and 1 box mg 173 boxes books and and 3 box mg

3 boxes books and 1 mg

Shantel has 3 red, 9 purple and 18 green hair ties. She divides all hair ties up to the largest possible number of groups with the same number or red, purple and green hair ties. How many group of hair ties are there? 1 groups 9 groups 3 groups 6 groups

3 groups

Factors are numbers you can multiply to get another number

3 x 4 = 12

Which number is not a factor of 114? 19 4 2 57

4

Juan and Joe start walking around a track at the same time and at the same place. It takes Joe 8 minutes to walk around the track and it takes Juan 10 minutes. After how many minutes will they reach the starting point at the same time. 20 min 80 min 40 min 56 min

40 min

An art supply store owner has 12 markers, 24 pens, and 30 pencils that haven't been sold. She wants to make identical packs of these items to sell next to the cash register. What is the greatest number of packs that can be made that uses all the markers, pens, and pencils? 6 12 2 3 12/4=3sets 24/8=3sets 30/10=3sets 12/2=6 24/4=6 30/5=6 12/1=12 doesn't really comply ​

6

Factor of: 12 1 2 3 4 6 12 18 1 2 3 6 9 18 The common factor that is shared is 1 2 3 6 The question is, what is the greatest factor shared?

6

What is the LCM of 15 and 12? 15: 15, 30, 45, 60, 75, 90, 105, 130, 145. 160, 175 12: 2, 3, 4, 6, 12, 24, 36, 48, 60 45 180 120 60

60

How many factors does 36 have? 4 9 10 8

9 1, 2, 3, 6, 7, 9, 12, 18, and 36