Rachel is 12 years old, and her grandfather is 7 times her age. Her mother is half grandfather's age, and her father is 5 years older than her mother. How old will Rachel's father be when she is 25 years old?
Rachel's grandfather is 12 x 7 = <T>multiply(12, 7)=84 years old.
Her mother is 84/2 = <T>divide(84, 2)=42.0 years old.
Her father is 42 + 5 = <T>add(42, 5)=47 years old.
Rachel will be 25 years old in 25 - 12 = <T>subtract(25, 12)=13 years.
Rachel's father will be 47 + 13 = <T>add(47, 13)=60 years old.
