Question
Gem is 15 years old now. She is 40 years younger than her mother. In how many years' time will Gem's mother be thrice as old as Gem?
4 m

Click button first when a symbol is required. X

Gem is 15 years old now. She is 40 years younger than her mother. In how many years' time will Gem's mother be thrice as old as Gem?