Question

you are eighth in line to swinng at the playground. if every person ahead of you swings for 5 minutes, how long will you wait to swing?

Answer 1

You are eighth then there are 7 people in front of you
assuming that no one is on the swing yet, you will have to weight through 7 people

 each person is 5 mins so 7 times 5=35 mins
so 35 mins the answer is

Answer 2

You will have to wait 35 minutes before you can begin enjoying the swings. 
To find this on your own, simply multiply 5 times 7. This is due to seven people being ahead of you, who will be swinging for 5 minutes each. 
Be careful, these problems can try to trick you, remember that you a eighth in line, you do not have eight people ahead of you.