These stumped Adam!

Try to twist your brain around these puzzles. Answers will be posted on Monday.

1. A bat and ball together cost $1.10. The bat costs $1.00 more than the ball. How much does the ball cost?

2. A cluster of lily pads is growing in a pond. Each day the cluster doubles in size covering more of the surface of the pond. If the pond is completely covered in 48 days, how many days does it take for the pond to be half covered?

3. If 5 machines take 5 minutes to make 5 widgets how long will it take 100 machines to make 100 widgets?

4. There is a man that lives on the top floor of an 11 story building. Everyday he gets the elevator down to the ground floor to leave the building to go to work. Upon returning from work though, he always travels on the elevator only up to the 7th floor and walks the stairs the rest of the way. unless it is raining. Why does he do this (it is not because he needs the exercise)?

For more visit WebRiddles.com or check out these PCL titles-
The lady or the tiger? : and other logic puzzles, including a mathematical novel that features odel's great discovery
The Oxford A-Z of word games

Have a great weekend!