How many graduate students does it take to screw in a light bulb

Question: How many graduate students does it take to screw in a light bulb?

Answer: Only one, but it may take upwards of five years for him to get it done.

Answer: It all depends on the size of the grant.

Answer: Two and a professor to take credit.

Answer: 1/100. A graduate student needs to change 100 lightbulbs a day.

Answer: I don't know, but make my stipend tax-free, give my advisor a $100,000 grant of the taxpayer's money, and I'm sure he can tell me how to do the work for him so he can take the credit for answering this incredibly vital question.