Problem 4
You have nine marbles. Out of nine marbles there is one marble that weighs slightly heavier than the rest. The rest of the marbles all weigh the same. How would you find the heaviest marble, if you can only weigh them two times using a pair of scales? (A scales is like a see-saw: it will tell you which side is heavier.)

Problem 5
In the city of Aesara, there are equal numbers of men and women. 90% of the population support free education. Of those who do not, only two out of every ten are women.
If a person is selected at random from the population, what is the probability that it is a man who does not support free education?

1.You must show how you got your answer.
2.Entries to your maths teacher by Thursday 1.05 p.m at latest.
3 Prizes for best solutions over the week.