1,334 prompts matching "Beads on a necklace, and why the count halves"
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Common Mistakes: A binary operation defined by arithmetic modulo n
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Learn: Simplifying a surd by extracting the largest perfect square
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Spot My Mistake: Squaring a bracket that contains a surd
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WAEC Prep: Comparing the sizes of two surds without a calculator
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Show All Working: Expressing a number in the form a root b
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Final Revision: Proving that root 2 is irrational
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Spot My Mistake: The power law of logarithms
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WAEC Prep: The change of base formula for logarithms
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Common Mistakes: Solving an exponential equation using logarithms
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Quiz: Forming a quadratic equation whose roots are given
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Show All Working: Solving a quadratic by completing the square
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Common Mistakes: Proving that a quadratic expression is positive for every real x
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Final Revision: Solving a disguised quadratic by substitution
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Practice: Factorising a cubic completely once one factor is known
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Spot My Mistake: The factor theorem for a divisor of the form ax minus b
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Show All Working: Solving a cubic equation by factorisation
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Learn: The sum of the roots of a cubic read from its coefficients
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Quiz: The product of the roots of a cubic
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Practice: Finding the third root of a cubic when two are known
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WAEC Prep: Finding a coefficient of a cubic given one of its roots
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