If 3 cats can kill 3 rats in 3 minutes, how long will it take 100 cats to kill 100 rats?

## There is a three digit number

There is a three digit number. The second digit is four times as big as the third digit, while the first digit is three less than the second digit. What is the number?

## In a lake there is a patch of lily pads

In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half the lake?

## Movie time

If you go to the movies and you are paying, is it cheaper to take one friend to the movies twice or two friends to the movies at the same time?