Nick is 13 years old. His sister is 6 years older and their brother is half their combined age. How old would their brother be in 5 years?
Nick's sister is 13 + 6 = <<13+6=19>>19 years old.
Their combined age is 19 + 13 = <<19+13=32>>32 years old.
Their brother is 32/2 = <<32/2=16>>16 years old.
In 5 years, their brother would be 16 + 5 = 21 years old.
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