Prime Factorization
Write the Prime Factorization of 24
2^3*3
List the first five multiples of 10
10,20,30,40,50
Find the LCM of 4 & 6
LCM=12
Josh and Eva are packing first-aid supplies for soldiers over seas. It takes Josh 12 minutes and Eva 8 minutes to pack a box. If they start packing boxes at the same time, how long will it be before they start packing a box at the same time again?
24 minutes.
Write the prime factorization of 77
7*11
List the first eight multiples of 12
12,24,36,48,60,72,84,96
Find the GCF of 24 & 36
GCF=12
Find the LCM of 4 & 22
LCM= 44
A fruit salad recipe calls for grapes, strawberries and chunks of cantelope. What is the greatest number of servings that can be made using all the fruit if you have 36 strawberries, 90 grapes and 72 chunks of cantelope?
18 servings
Write the prime factorization of 200
2^3*5^2
List the first five multiples of 14
14,28,42,56,70
Find the GCF of 30 and 75
GCF=15
A jeweler is making identical necklaces. He has 24 gold beads and 108 colored glass beads. How many necklaces can be made using all the beads?
12 necklaces
Write the prime factorization of 144
2^4*3^2
List the first six multiples of 13
13, 26, 39, 52, 65, 78
Find the LCM of 20 & 35
LCM=140
The sanitation department picks up garbage every 3 days and recycling every 4 days. If today is May 4th and both garbage and recycling were picked up. What will the date be when they are both picked up on the same day again?
May 16th
Write the prime factorization of 702
2*3^3*13
List the first four multiples of 28
28, 56, 84, 112
What is GCF of 65, 39, and 26?
GCF = 13
What is LCM of 6, 9, and 12
LCM=36
David is helping his father paint a fence. David can paint a board in 8 minutes and his father can paint a board in 12 minutes.
a) If they started a board at the same time just now, how many minutes will pass before they start another board at the same time again?
b) How many board would each of them have painted after working for 2 hours?
a) 24 minutes
b) David = 15 boards ; Davids father = 10