### Brain Teasers

# All In The Family

Math
Math brain teasers require computations to solve.

Joe's dad is three times older than Joe. Joe's grandfather is twice as old as Joe's dad. The sum of all their ages is 100. How old are Joe, his dad, and his grandfather?

### Answer

Joe is 10, his father is 30, and his grandfather is 60.Set up the equations:

D = 3 * J

G = 2 * D

J + D + G = 100

Solve these to get the answer.

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