1, '' My age is a half of the age my sister ". '' My sister is 24 years old. ''

=> Then, my age is:

        24 : 2 = 12

=> My name is Mia.

2, " My age has no tens ". Then, my age has 1 digit-number

-  In four people, Sarah is a person has the age is 1 digit-number.

=> My name is Sarah.

3, '' My age has five tens on it ". Then, my age is 5a.

- In four people, Ranjit is a person has the digit tens is 5

=> My name is Ranjit.

4, '' My age is half of 48 ". Then, my age is:

        48 : 2 = 24

=> My name is Lucy