Larry is 10 years old and his sister is 7 years old. In how many years time will there total age be 25 years?
In the next 25 years, Larry will be 35 years old, while his sister will be 3 years less than him which is 32 years old for his sister, since his sister is 3 years younger.
In 4 years, their ages will add up to 25. Larry will be 14 and his sister will be 11