James has 20 years of experience. 8 years ago John had twice as much experience as James. Mike started when John had 16 years of experience. What is their combined experience?
Reason slowly and give your answer.
68
8 years ago James had 20 - 8 = 12 years.

So 8 years ago John had 12 * 2 = 24 years experience.

That means John has 24 + 8 = 32 years experience.

So Mike has 32 - 16 = 16 years of experience.

So together they have 20 + 32 + 16 = 68 years experience.

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Final answer: 68