755 prompts matching "Learn: The algebraic sum of moments when the senses differ"
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Comparing the size of two large index numbers
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Explaining why a^1/n means the nth root of a
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Simplifying the square root of a larger number
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Estimating the value of a surd
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Rationalising the denominator when it's a surd minus a surd
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Finding the nth term of an arithmetic sequence
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Finding the number of terms in an arithmetic series
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Finding the nth term of a geometric sequence
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Equation of the perpendicular bisector of a segment
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Finding the equation of a line parallel to the x-axis or y-axis through a point
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Finding the equation of a circle from its centre and radius
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Finding the equation of a median of a triangle
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Factorising the difference of two squares
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Changing the subject of a simple formula
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Changing the subject when the variable appears twice
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Algebraic long division of a simple polynomial by a linear factor
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Worked Example: Why the square root of a non-square whole number is irrational
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Common Mistakes: Expanding the product of two surd brackets
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Learn: Why a surd is never left in the denominator
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Common Mistakes: Rationalising a denominator of the form root a over root b
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