Problem:
Kiana has two older twin brothers. The product of their three ages is 128 . What is the sum of their three ages?
Answer Choices:
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Solution:
The age of each person is a factor of . So the twins could be years of age and, consequently, Kiana could be , or years old, respectively. Because Kiana is younger than her brothers, she must be 2 years old. The sum of their ages is .
The problems on this page are the property of the MAA's American Mathematics Competitions