705 prompts matching "Deciding whether a given rule really is a binary operation"
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Common Mistakes: The fallacy of denying the antecedent
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Final Revision: An argument written in words and tested for validity
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Spot My Mistake: Arrangements with two particular items adjacent
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Common Mistakes: Arranging objects when some must stay in a fixed order
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Final Revision: Counting the arrangements of people in a queue
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Quiz: Why one person is fixed in a circular arrangement
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Spot My Mistake: Arrangements round a table with men and women alternating
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Common Mistakes: Comparing a line arrangement with a circular one
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Final Revision: A word problem about seating at a round table
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Spot My Mistake: A selection with at least a stated number of one kind
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Common Mistakes: The number of ways of dividing a class into groups
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Final Revision: A word problem about choosing a delegation
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Common Mistakes: A probability found by counting arrangements
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Final Revision: A word problem about a lottery draw
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Spot My Mistake: Expanding a bracket with a minus sign inside it
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Common Mistakes: The link between Pascal's triangle and combinations
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Final Revision: Expanding a bracket of the form a plus b over x
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WAEC Prep: The two middle terms when n is odd
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Common Mistakes: The general term when one term in the bracket is negative
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Final Revision: A question asking for two coefficients to be equal
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