755 prompts matching "Structured question: permutation versus combination in one paper"
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Common Mistakes: Rationalising when both terms of the denominator are surds
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Practice: Solving an equation with a surd on each side
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WAEC Prep: Equating the rational and the irrational parts of an equation
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Show All Working: Finding a and b when a plus b root 2 equals a given surd
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Practice: A binary operation set out as a table
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WAEC Prep: Writing a binary operation rule from a description in words
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Common Mistakes: A binary operation that is ordinary addition in disguise
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Practice: Testing a set for closure under multiplication
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Show All Working: Showing a set is not closed by a single counter-example
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Show All Working: An operation that is associative but not commutative
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Practice: Multiplication distributing over addition in ordinary arithmetic
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Show All Working: Using distributivity to simplify an expression
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WAEC Prep: The inverse of the identity element itself
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Show All Working: An element with no inverse under a given operation
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Common Mistakes: Checking an inverse by working the operation both ways
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Show All Working: Simplifying an expression with letters and indices
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Common Mistakes: Why the index laws need the bases to match
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WAEC Prep: Evaluating 8 to the power two-thirds
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Show All Working: Simplifying an expression that mixes the index types
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