Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 3 - Adding and Subtracting Fractions - 3.2 Least Common Multiples - 3.2 Exercises - Page 213: 55

Answer

The student missed the smallest multiple.

Work Step by Step

The student chose the number 240, which is a multiple of all of the numbers given. However, the student misunderstood what is meant by the "least" common multiple. The student was supposed to select the smallest number which is a multiple of all of the given numbers. This number is 120. Thus, 240 is not the least common multiple.
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