1,029 prompts matching "Learn: Telling a rational number from an irrational one"
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Common Mistakes: The degree of the quotient and of the remainder
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Show All Working: A remainder of nought, and what it means
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Common Mistakes: Factorising fully, and knowing when to stop
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WAEC Prep: The relation between the roots and the constant term
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Show All Working: Solving a cubic that must first be rearranged
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WAEC Prep: The symbols used for and, or and not
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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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WAEC Prep: Why a conditional and its contrapositive are equivalent
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Show All Working: Why a conditional and its converse are not equivalent
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Common Mistakes: Deciding between tautology, contradiction and contingency
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WAEC Prep: Testing an argument for validity by truth table
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Common Mistakes: The fallacy of denying the antecedent
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WAEC Prep: Arrangements with two particular items not adjacent
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Show All Working: Arrangements of boys and girls alternately
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Common Mistakes: Arranging objects when some must stay in a fixed order
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WAEC Prep: Beads on a necklace, and why the count halves
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Explain Back: A selection that must exclude one particular member
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Show All Working: Selecting a committee with the chairman named separately
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Common Mistakes: A probability found by counting arrangements
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