When my sister was born, I was 2 more than 1/5 of my mother's age. Now that my sister is 1/4 of my mother's age, how old am I?
+36919 Here is one possibility
your mom gives birth to your sister when your mom is 30 .... you are 7 at the time
10 years later, your sister is 10, your mom is 40 and you are 17
