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0 5 -1 0 -02 C omm on M ultiple & LCM
1. Write three common multiples for each pair of numbers:
A. 2, 3
C. 5, 7
B. 4, 5
D. 6, 8
2. State whether the following statements are TRUE or FALSE.
A. 12 is a common multiple of 3 and 5
B. A prime number does not have any multiples
C. Every multiple of 5 has a 5 or 0 in the units place
D. A few multiples of 2 are odd while most are even numbers
3. Find the 2 Common Multiples of the following numbers by listing the
multiples of each number.
A. 4:
7:
B. 3:
5:
C. 6:
8:
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0 5 -1 0 -02 C omm on M ultiple & LCM
4. Find the Least Common Multiple of each pair of number.
A. 3 & 5
D. 6 & 8
B. 4 & 7
E. 8 & 12
C. 5 & 7
F. 9 & 12
5. Find 2 numbers who have the given LCM. Do not use the LCM as
one of the numbers.
A. LCM: 12
C. LCM: 24
B. LCM: 18
D. LCM: 36
6. Pencils are sold in packs of 5 and crayons are available in packs of 6.
How many packs of each will be required to buy an equal number of
pencils and crayons?
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0 5 -1 0 -02 C omm on M ultiple & LCM
7. John has 6 inches long pieces of wood. What minimum length can he
get by putting these pieces together such that the length is a multiple
of 10 inches?
8. The GFC of two numbers is 2. Their product is 24. What is the LCM
of the two numbers?
9. The LCM of two numbers is 40 and their GCF is 2. If the first number
is 8, what is the second number?
10. If 7 is factor of 21, then all multiples of 21 are multiples of 7. Do you
agree? Explain.
11. If the GCF of two numbers is 1, then the LCM of the two numbers is
their product. Do you agree? Explain.