Logic Riddles

Question: A teacher decides to give a pop quiz one day but all of her students refuse to take the quiz thinking that the teacher will call off the quiz. She can give only one of these students a detention for skipping the quiz. All of the students know each other's names and if a student knows he/she is getting a detention they take the quiz.

How can she threaten her students with the single detention so they all take the quiz?

Question: Thomas has missed an excessive number of days of school, so he must meet with Principal Davis. Mr. Davis asks him "Why on Earth have you missed so many days?"

Thomas replies "There just isn't enough time for school. I need 8 hours of sleep a day, which adds up to about 122 days a year. Weekends off is 104 days a year. Summer vacation is about 60 days. If I spend about an hour on each meal, that's 3 hours a day or 45 days a year. I need at least 2 hours of exercise and relaxation time each day to stay physically and mentally fit, adding another 30 days.

Add all of that up and you get about 361 days. That only leaves 4 days for school."

The principal knows Thomas is full of it, but can't figure out why. Where is Thomas going wrong?

Question: You find me behind the stars; or in a sixth, seventh, or third.
It takes something round, a computer, and me to make pie.
I am bigger than anything you can think of.

What am I?

Question: A man is at work when he turns off the light and falls asleep. When he wakes up he discovers that lots of people have died.

What is his profession?

Question: A woman goes into a bank in Chicago and asks for a $1,000 loan for an upcoming trip she has planned to Asia. The loan officer tells her she will need collateral if she wants the loan.

She tells the loan officer "I'll leave my car, it's worth $150,000." The bank takes the car for the loan, laughing at her for leaving such expensive collateral.

A month later when the woman comes back she pays off her loan plus interest, costing her $1,020. The bank manager smirks at her and asks "While you were gone we found out you're very wealthy. Why would you get such a small loan and leave such expensive collateral?"

She tells him why and he realizes she's not as dumb as they thought. Why did she get the loan?