695 prompts matching "GP with 3rd term 18 and 6th term 486: find a and r"
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Finding the equation of a median of a triangle
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Coordinate geometry applied to a triangle's area check
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Factorising by taking out a common factor
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Multiplying two algebraic fractions
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Dividing algebraic fractions
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Representing a solution set on a number line
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Solving simultaneous linear equations by substitution
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Solving simultaneous linear equations by elimination
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Changing the subject of a simple formula
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Solving a word problem using simultaneous equations
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Practice: Deciding whether root 16 is rational or irrational
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Show All Working: Classifying a mixed list of numbers as rational or irrational
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Common Mistakes: Why a rational number added to an irrational one stays irrational
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Practice: Collecting similar surds in an expression
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Common Mistakes: Expressing root 50 as a multiple of root 2
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Practice: Multiplying a whole number by a surd
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Show All Working: Simplifying a surd expression that contains brackets
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Show All Working: Checking a rationalised answer by decimal approximation
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Common Mistakes: Rationalising a denominator of the form root a over root b
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Practice: Rationalising a denominator of the form a plus root b over c minus root d
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