869 prompts matching "WAEC past questions: Why casting out nines catches some errors and not others"
Quiz: Finding an obtuse angle with the cosine rule
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Learn: Constructing the perpendicular bisector of a chord
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Quiz: Locating the twentieth percentile on an ogive
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Worked example: Multiplying algebraic fractions, cancelling first
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Practice: Finding the surface area from the radius
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Practice: Using brackets to force the intended order
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Learn: The kite formed by two tangents and two radii
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Spot my mistake: The area under a speed-time graph read as distance
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Spot my mistake: The angle sum of a polygon in general
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Worked example: Finding the arc length from the angle and the radius
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Practice: The domain of a function containing a fraction
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Spot my mistake: Setting each bracket to nought to find the roots
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Learn: Finding a missing angle in a cyclic quadrilateral
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Practice: Enlarging with a fractional scale factor
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Learn: The volume of a triangular prism
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Spot my mistake: Reading across and then down to the median value
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Practice: The number of elements in a union
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Learn: Where the sine curve crosses the x-axis
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Learn: Checking the answer against the longest side
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Learn: The symbols for element, subset and empty set
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