1. My age is a two-digit number.

I am half the age of my sister.

My sister is 24 years old.

=>My age is 12.(half of 24)

=> My name is Mia.

2. I am half of my sister's age.

There are no tens in my age.

=>My age is 6.(the only age has no tens)

=>My name is Sarah.

3. My age has five tens in it.

I am 30 years older than my eldest daughter.

=>My age is 54.(the only age has five tens)

=>My name is Ranjit.

4. My age has the same number of tens as double 10.

My age is half of 48.

=>My age is 24.(half of 48)

=>My name is Lucy.