1,045 prompts matching "IGCSE Additional Maths Y10: The half-life of a decaying quantity — Common Mistak"
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Final Revision: Checking a factorisation by expanding it again
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Learn: Solving a cubic once it has been factorised
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Show All Working: Solving a cubic that must first be rearranged
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Common Mistakes: A cubic equation arising from a volume problem
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Learn: What makes a sentence a proposition
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Show All Working: Translating an English sentence into logical symbols
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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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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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Learn: What a tautology 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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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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Common Mistakes: Arranging objects when some must stay in a fixed order
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Learn: What makes a permutation cyclic
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Common Mistakes: Comparing a line arrangement with a circular one
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