Please attempt the following puzzles and hand up your solutions to your maths teacher by 4pm on Wednesday.

3. If you toss six coins what is the probability that at least one is a head?

4. A contract painter bought 15 cans of white paint and 20 cans of green paint for €409.50. Near the end of the job he returned 5 of the green cans and got 6 cans of white in exchange. No extra money was paid by him and no money was returned to him. What is the price of one can of green paint?

5. Which one of the following patterns, when folded, will make the cube?

picture 1