Question

. Sixteen students from lunch table 1 line up in the hot lunch line. When given the signal, students 1 through 7 enter the kitchen. As student 1 leaves the kitchen, students 8 and 9 enter it. As student 2 leaves, students 10 and 11 enter. If this process is repeated, when should the last student in line enter the kitchen?
when the third student leaves the kitchen
when the fourth student leaves the kitchen
when the fifth student leaves the kitchen
when the sixth student leaves the kitchen

Answer 1

when the fifth student leaves