LCM
What is the LCM of 4 & 6?
4: 4, 8, 12
6: 6, 12
LCM: 12
What is the GCF of 8 & 6?
GCF: 2
What is the prime factorization of 16?
2 x 2 x 2 x 2
Is 465 divisible by 2? Why or why not?
No, 5 is odd.
What is 5.2 x 3.4?
17.68
What is the LCM of 7 & 8?
7: 7, 14, 21, 28, 35, 42, 56
8, 8, 16, 24, 32, 40, 48, 56
LCM: 56
What is the GCF of 10 & 25?
GCF: 5
What is the prime factorization of 42?
2 x 3 x 7
Is 305 divisible by 5? Why or why not?
Yes, because it ends in a 5.
What is the sum of 41.56 and 12.2?
53.76
Boxes that are 12 inches tall are being stacked next to boxes that are 18 inches tall. What is the shortest height at which the two stacks will be the same height?
12: 12, 24, 36
18: 18, 36
LCM: 36
36 inches
What is the GCF of 52 & 16?
GCF: 4
What is the prime factorization of 150?
2 x 3 x 5 x 5
Yes, because it ends in 0.
UCLA
Pencils come in packages of 10. Erasers come in packages of 12. Phillip wants to purchase the smallest number of pencils and erasers so that he will have exactly 1 eraser per pencil. How many packages of pencils and erasers should Phillip buy?
10: 10, 20, 30, 40, 50, 60
12: 12, 24, 36, 48, 60
LCM: 60
Pencils: 60 divided by 10 = 6 packs of pencils
Erasers: 60 divided by 12 = 5 packs of erasers
Peter has 18 oranges and 12 bananas. 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?
GCF: 6
What is the prime factorization of 51? Is 51 prime or composite?
3 x 17
Composite
What is 51 divisible by? (Other than 1 and 51). How do you know?
51 is divisible by 3 because the sum of the digits (5+1 = 6) is divisible by 3 (6/3 = 2).
RIDDLE: What do you call a guy with a rubber toe?
Roberto.
Cups are sold 6 to a package and plates are sold 8 to a package. If you want to have the same number of each item for a party, what is the least number of packages of each you need to buy?
6: 6, 12, 18, 24
8: 8, 16, 24
LCM: 24
24 divided by 6 = 4 packages of cups
24 divided by 8 = 3 packages of plates
Sara has 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 she can make?
GCF: 8
What is the prime factorization of 4500?
2 x 2 x 3 x 3 x 5 x 5 x 5
3 teams of 19 or 19 teams of 3.
I give you all the money in the world but I receive nothing. What am I?
A tree.