34. The Ageless Ted and Alice
Ted is seven years younger than Alice but in four years time their ages will be such that he is half as old as her.
How old are they now?
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let Ted's age = t and Alice's age = a
so now t = a - 7
and in four years time
t + 4 = (a + 4)/2
and, solving these, t = 3 and a = 10
so Ted is 3 and Alice is 10
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