1,045 prompts matching "Practice: Finding n when the sum of a geometric progression is given"
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Common Mistakes: Translating a symbolic statement back into English
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Final Revision: A compound proposition built from three simple ones
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Learn: How many rows a truth table needs
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Spot My Mistake: Building a truth table column by column
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Quiz: Why a conditional with a false antecedent counts as true
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Show All Working: Why a conditional and its converse are not equivalent
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Final Revision: A conditional statement set in an everyday situation
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Spot My Mistake: De Morgan's laws in logic
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Learn: What a tautology is
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Quiz: What a contingency is
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Common Mistakes: Deciding between tautology, contradiction and contingency
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Final Revision: A longer statement tested for tautology
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Learn: What makes an argument valid
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Quiz: Modus ponens
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Spot My Mistake: Disjunctive syllogism
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Final Revision: An argument written in words and tested for validity
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Learn: Arranging five different books on a shelf
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Spot My Mistake: Arrangements with two particular items adjacent
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Learn: What makes a permutation cyclic
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Quiz: Why one person is fixed in a circular arrangement
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