# Hint to Riddle #77: Where's the Father

77. A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.

Where's the father?
Slight twist on a classic puzzle. You might be able to guess the answer, if not then chug on with working the numbers until it's revealed. I'm sure you've seen these before, 'in 6 months time I'll be twice as old as my dog.' It comes down to some fairly simple algebra.

Two confirm the equations you'll be solving are:

M = C + 21

M + 6 = 5(C + 6)

Two equations, two unknowns. Easy. If not, have a Google of simultaneous equations.

Where next?

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