The Birthday Problem
Calculus
Level
pending
A mother is 21 years older than her child. In 6 years the mother will be 5 times older than her baby.
Where is the father with respect to the mother?
Outside her
Inside her
To the right of her
To the left of her
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1 solution
m = 21 + x; m + 6 = 5(x+6); (21 + x) + 6 = 5x + 30; x + 27 = 5x + 30; -4x = 3; x = -3/4 years = 9 months before the baby is born... You can solve the rest