1,045 prompts matching "Learn: The formula for the sum of the first n terms of an arithmetic progression"
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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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Spot My Mistake: De Morgan's laws in logic
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Worked Example: What a contradiction 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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Worked Example: Premises and conclusion
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Quiz: Modus ponens
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Spot My Mistake: Disjunctive syllogism
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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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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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Common Mistakes: A probability found by counting arrangements
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Spot My Mistake: Expanding a bracket with a minus sign inside it
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IGCSE Additional Maths Y11: Converting radians into degrees — Quiz Me
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IGCSE Additional Maths Y11: A composite region built from a rectangle and a sector — Common Mistakes
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IGCSE Additional Maths Y11: Finding every angle in a range with a given sine — Common Mistakes
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