Maria found the least common multiple of 6 and 15 Multiples of 6 : 6 comma 12 comma 18 comma 24 comma 30 comma 36 comma 42 comma 48 comma 54 comma 60 comma dot dot dot Multiples of 15 : 15 comma 30 comma 45 comma 60 comma dot dot dot The least common multiple is 60 What is Maria’s error?
Answer
A
Maria listed factors of each number instead of multiples.
B
Maria listed some values that were not multiples.
C
Maria selected a multiple that is not the least common multiple.
D
Maria should have multiplied 6 and 15 to find the least common multiple.
Explanation
Both 30 and 60 appear in the lists, so they are common multiples of 6 and 15. Since 30 is smaller than 60, it is the least common multiple. Maria selected a common multiple, but it was not the least one.
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