Take a crazy ball and drop it from certain heights, say, 2m, 1.5m, 1.0m and .5m and note down the number of bounces made by ball before coming to rest. Plot a graph between heights and number of bounces. Write your conclusions, you can repeat this experiment with different balls and different floors.
For this homework I think you are supposed to try it out and see what happens. It's called an experiment and involves collecting and analysing data to form conclusions. This is an important skill and you won't learn anything by copying someone else's answer.
Have you got a ball? And a tape measure? And a pen and paper?
Easy.
You may get some surprising results if you drop a small steel ball bearing into a restricted container onto a hard surface. Yes steel bounces very well.