1. how many different outcomes are possible if you choose one kind of wrapping paper (tissue, cellophane, foil) and one coloured ribbon (pink, yellow, orange, blue, red)

2. if you have 10 cents, 20 cents and $1 coins, in how many ways can you make up $2 (australian money)

3. when veronica visited great britain, the british pound was worth us$1.40 while au$1.00 was worth us$0.70. in this case, how many au& was a british pound worth?

4. a certain type of water lily spreads to double the area it covers every year. ten years after being planted in our lake these water lilies cover a quarter of its surface. how many more years will it be before they cover the entire surface of the lake?