Name:
Name: ______________________ Practice 10-2
Common Multiples and Least Common Multiple
Find the LCM of each pair of numbers. Use the list method.
1.) 3 and 6 ____________________________________________
2.) 7 and 10 ___________________________________________
3.) 8 and 12 ___________________________________________
4.) 4 and 6 ____________________________________________
5.) 6 and 7 ____________________________________________
Find the LCM of each pair of numbers. Use the prime factorization method.
6.) 6 and 12 7.) 6 and 9
8.) 5 and 20 9.) 4 and 7
10.) Jason’s birthday party punch calls for equal amounts of pineapple juice and orange juice. Pineapple juice comes in 6-oz cans and orange juice comes in 10-oz cans. What is the least amount he can mix of each kind of juice without having any left over?
11.) Reasonableness:
Dawn ordered 4 pizzas each costing between 8 and 12 dollars. What is a reasonable total cost of all 4 pizzas?
a. less than $24 c. between $32 and $48
b.) between $12 and $24 d. about $70
Answer key:
1.) 6 2.) 70 3.) 24 4.) 12
5.) 42 6.) 12 7.) 18 8.) 20
9.) 28 10.) 30 oz of each 11.) C
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