Why an interview is getting more complicated

Source: WSJ.com

5 Google Interview Questions

1. What's the next number in this sequence: 10, 9, 60, 90, 70, 66 … ?
Asked at Google

2. You're in a car with a helium balloon on a string that is tied to the floor. The windows are closed. When you step on the gas pedal, what happens to the balloon—does it move forward, move backward, or stay put?
Asked at Microsoft

3. Using only a four-minute hourglass and a seven-minute hourglass, measure exactly nine minutes—without the process taking longer than nine minutes.
Asked at Google

4. A book has N pages, numbered the usual way, from 1 to N. The total number of digits in the page numbers is 1,095. How many pages does the book have?
Asked at Google

5. A man pushed his car to a hotel and lost his fortune. What happened?
Asked at Google