Sydney is 20*3 = <<20*3=60>>60 years old.

Mason’s father is 60+6 = <<60+6=66>>66 years old.

# Answer

66
<|im_start|>system
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<|im_start|>user
Mason is three times younger than Sydney and Sydney is six years younger than Mason's father. If Mason is 20 years old, how old is his father?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
66
Mason is three times younger than Sydney and Sydney is six years younger than Mason's father. If Mason is 20 years old, how old is his father?
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