QUESTION:
Jack is 35 years old. 3 years ago, Jack was 4 times as old as John was then. How old is John now?
The correct ANSWER is 11.
The thing we need to find is John’s age now. Let’s name it as ‘x’. John’s age three years ago is x-3. Jack was 32 three years ago. So the equation is:
4 (x-3) = 32
4x -12 = 32
4x = 32 + 12
4x = 44
X = 44/4
x= 11
Or
35 -3 = 32 (Jack’s age 3 years ago)
32/4 = 8 (John’s age 3 years ago)
8 + 3 = 11 (John’s age now)