You are running algorithm with squared complexity on data with 100 elements and it takes 10 seconds. How much time do you expect the algorithm will take when executed on data with 1000 elements?

With a short time remaining in the day, a delivery driver has time to make deliveries to 6 different locations among the 7 locations remaining. How many different routes are possible?

Once a computer worm infects a personal computer via an infected e-mail message, it sends a copy to 25-e-mail addresses it finds in the electronic message mailbox on this personal computer. What is the maximum number of different infected computers in the time it takes for the infected message to be forwarded six times? Note: You should count the total of infected computers including the initial one.

How many ways can 6 people be chosen and arranged in a straight line if there are 8 people to chose from?