Kevin is 42 years old and Daniel is 3 years old. How many years will it take until Kevin is only 4 times as old as Daniel?

Think about it. When Kevin is 56, then Daniel will be 14. 56/14 equal to 4. Answer is 11 years.

10 years because 42 plus 10 equals 52 and 3 plus ten equals 13 and 52 divided by 13 is 4.