Jack won 65 lollipops playing basketball at the country fair. At school he gave four to every student in his math class. He only has 1 remaining. How many students are in his math class.
Jack gave away 65 - 1 = <<65-1=64>>64 lollipops to his math class.
There are 64 / 4 = <<64/4=16>>16 students in Jack's math class. Answer: \boxed{16}.