Can you check the following problems?

Question

Tell if the problem can be solved by using GCF or LCM and then solve.
1. Joanne is campaigning for class president and plans to distribute 20 flyers and 16 buttons. She wants each classroom to receive an identical set of campaign materials without having any materials left over. What is the greatest number of classrooms she can distribute materials to?
Answer: GCF, 4 classrooms
16: 1,2,4,8,16
20: 1,2,4,5,20

2. Edenna is packing equal numbers of apple slices and grapes for snacks. She bags the apple slices in groups of 18 and grapes in groups of 9. What is the smallest number of grapes that she can pack?
Answer: LCM, 18 grapes
9: 9,18
18: 18

3. A club has 16 girls and 8 boys as members. the president wants to break the club into groups, with each group containing the same combination of girls and boys. The president also wants to make sure no one is left out. what is the greatest number of groups the president can make?
Answer: GCF, 8 groups
8: 1,2,4,8
16: 1,2,4,8,16

4. Wilma is thinking of a number that is divisible by both 17 and 8. what is the smallest possible number that she could be thinking of?
Answer: LCM, 136
8:8,16,24,32,40,48,56,64...120,128,136
17:17,34,51,68,85,102,119,136

Answer 1

They are all correct great job for not getting LCM and GCF mixed up! I used to get them mixed up all the time when I was in 6th grade.

Answer 2

It was a little confusing to know which one to use. Is there a method for knowing the difference - like looking for keywords 'greatest' or 'smallest'?

Answer 3

Yes

Answer 4

Ellie is thinking of number that is devisible by both 17 and 8 . What is the smallest possible that Ellie could think of

Answer 5

This Is really well done!!

Answer 6

It's funny because I'm in grade eight and I am doing this :D

Answer 7

Kristi has 16 apple slices and 24 grapes. If she wants to make identical snack packs using all of the fruit, what is the largest number of packs she can make? *