2000 AMC 8 竞赛试题/第1题
Problem
Aunt Anna is
years old. Caitlin is
years younger than Brianna, and Brianna is half as old as Aunt Anna. How old is Caitlin?
![]()
If Brianna is half as old as Aunt Anna, then Briana is
years old, or
years old.
If Caitlin is
years younger than Briana, she is
years old, or
.
So, the answer is ![]()
Since Brianna is half of Aunt Anna's age this means that Brianna is
years old. Now we just find Caitlin's age by doing
. This makes
or ![]()
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