SOLUTION: A is 10 yrs older than B. B is 10 yrs younger than C. D is 10 yrs older than A . E is ten years younger than D . Who is the youngest ?

Question 927721: A is 10 yrs older than B. B is 10 yrs younger than C. D is 10 yrs older than A . E is ten years younger than D .
Who is the youngest ?
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
ALGEBRA-STYLE:
A (who is years old) is 10 yrs older than B (who is years old), so
B is 10 yrs younger than C (who is years old), so
<--->
D (who is years old) is 10 yrs older than A, so
--->--->
E (who is years old) is ten years younger than D, so
--->---> .
So, is the youngest,
A, C, and E are all the same age, and 10 years older than B,
and D is 20 years older than B, and the oldest of them all.

You can also do it without algebra, plotting ages on a number line.
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