531 prompts matching "Quiz: Choosing a committee of r people from n"
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Finding the point of intersection of two lines
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Coordinate geometry proof: right-angled triangle
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Coordinate geometry proof: isosceles triangle
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Simultaneous equations of a line and the coordinate axes
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Survey word problem using a three-set Venn diagram
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Using sets to test simple logical statements
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Interpreting neither-nor in a Venn diagram problem
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Deriving the arithmetic series sum formula
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Simplifying a mixed index expression
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Standard form calculations using indices
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Index notation for a nested root
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Index law shortcuts for mental exam questions
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Simplifying a surd by extracting square factors
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Surds in the quadratic formula
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A three-region overlap problem with unknowns
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Common mistakes with set notation
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Reviewing set theory before a class test
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Logical reasoning puzzle solved using sets
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Recognising arithmetic vs geometric sequences
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Arithmetic mean between two numbers
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