（UK January 2021 Merchant Taylor\textquotesingle s School Question \#$23$）  Fatouma was asked how old she was. In reply she said, "In two years\textquotesingle~time I will be twice as old as I was five years ago." How old is Fatouma? 
Overseas Competition->Knowledge Point->Word Problem Modules->Age Problems->Basic Relationships in Age Problems->Difference of Ages