LCM & GCF (6th)

Pencils come in packs of 8 and highlighters in packs of 12.  
A.  What is the least number of pencils and highlighters you need to buy for an equal amount?
B.  What is the least number of packages you need to buy to have an equal amount of pencils and highlighters?

• A. 4  B.  2 pencil and 3 highlighter
• A.  48  B.  6 pencil and 4 highlighter
• A. 24  B. 3 pencil and 2 highlighter

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.  6 groups  B.  3 red and 4 green
• A.  72 groups  B.  6 red and 3 green
• A.  3 groups  B.  6 red and 8 green

An art project requires rows with the same number of discs and same amount of red and blue discs in each row.  You have 40 red discs and 24 blue discs.
A.  What is the greatest number of discs you could put in each row?
B.  How many red discs and blue discs will be in each row?

• A.  120 discs  B.  3 red and 5 blue
• A.  8 discs  B.  5 red and 3 blue
• A.  4 discs  B.  10 red and 6 blue

You are watching a parade and observe cars going by in groups of 4 blue cars and 6 green cars at a time.  If you observe the same number of blue and green cars, what is the smallest number of each car you could have observed?

• 2 cars
• 12 cars
• 24 cars

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?

• 4
• 2
• 48
• 8

Is this question asking to find GCF or LCM?

• GCF
• LCM

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?

• 55 minutes
• 25 minutes
• 60 minutes
• 75 minutes

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?

• 2
• 12
• 36
• 6

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?

• 16th customer
• 150th customer
• 300th customer
• 180th customer

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?

• 84 minutes
• 48 minutes
• 854 minutes
• 78 minutes