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NeurobicsBrain ExercisesRussell Dear 1. What is remarkable about the following statement? 2. Is the following statement true or false? 3. True or false? 4. Find the next number in the sequence 0, 3, 8, 15, 24, ... 5. In a survey investigating children's understanding of probability nearly 3,000 eleven to sixteen year-olds were asked the following question: A bag has in it some black and some white balls. A ball is chosen and its colour noted. After returning the ball, the bag is shaken. The process is repeated a total of four times, a black ball occurring on each occasion. A fifth ball is chosen. What colour is it likely to be? a) black is more likely again Two-thirds of the young people thought b) was correct. The other choices had about equal support. What is the correct answer? Answers in next month's issue. Russell Dear is a Mathematician living in Invercargill |
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