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Maths Puzzle
Numerical Ability
Use a tree diagram showing all possible results when 4 fair coins are tossed. List the ways of getting more than 2 tails.
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book Other Question
Use the difference-of-squares patterns to factor f the following.
(x+6)^2-(x+9)^2
Mr. Jones says that he has 3 daughters, the product of whose s is 72. Furthermore, the sum of their ages is equal to his house number. A mathematician claims that even though he kn