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.

   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
2. 2.

   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
3. 3.

   Noah has 48 pencils and 72 erasers. Noah makes as many identical supply bags as possible, with nothing left over. How many erasers go in each bag?

   3
4. 4.

   Pia sets up 60 chairs in the left section and 84 in the right. Every row has the same number of chairs, as many as possible. How many rows are in the right section?

   7
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.

   Ari buys the fewest plates and cups that give the same number of each. Plates come in packs of 8 and cups in packs of 12. How many packs of plates does Ari buy?

   3
7. 7.

   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
8. 8.

   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
9. 9.

   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
10. 10.

    Milo rewrites a sum. Write 70 + 42 as the greatest common factor times a sum. What do the two numbers inside the parentheses add up to?

    8