Greatest common factor, least common multiple

Answer Key - Grade 6 Math Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   Bo helps pack 84 notebooks and 60 folders into identical supply kits, with nothing left over. What is the greatest number of kits Bo can make?

   12
2. 2.

   Esme has 90 red ribbons and 75 blue ribbons for gift bags. Every bag gets the same number of each color, with none left over. What is the greatest number of bags Esme can fill?

   15
3. 3.

   Kira watches two trains leave the station together at 7:00 a.m. One leaves every 8 minutes and the other every 12. After how many minutes do they leave together for the second time after 7:00?

   48
4. 4.

   Milo has a swimming lesson every 6 days and a piano lesson every 12 days, both today. After how many days will Milo have both on the same day for the second time from today?

   24
5. 5.

   Ren plans a trip for 36 younger students and 45 older students. Each group has the same number of each, with as many groups as possible. How many older students are in each group?

   5
6. 6.

   Juice boxes come in packs of 10 and cookies in packs of 12. Bo buys the fewest of each to have one cookie per juice box. How many packs of cookies does Bo buy?

   5
7. 7.

   Pens come in packs of 6 and markers in packs of 12. Esme buys the fewest of each to have the same number of pens and markers. How many packs of pens does Esme buy?

   2
8. 8.

   Jun rewrites a sum. Write 90 + 54 as the greatest common factor times a sum. What do the two numbers inside the parentheses add up to?

   8
9. 9.

   Kira rewrites a sum. Write 56 + 98 as the greatest common factor times a sum. What do the two numbers inside the parentheses add up to?

   11
10. 10.

    Luz rewrites a sum. Write 90 + 36 as the greatest common factor times a sum. What do the two numbers inside the parentheses add up to?

    7