739 prompts matching "IGCSE practice: Choosing a sensible accuracy for an answer from its bounds"
Worked example: Proving three points are collinear with vectors
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WAEC pitfalls: Confusing a position vector with a displacement vector
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WAEC pitfalls: Writing a column vector with its components reversed
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WAEC pitfalls: Reflecting in y equals x by negating instead of swapping
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WAEC pitfalls: Assuming a negative scale factor simply shrinks a shape
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Worked example: Multiplying a 2 by 3 matrix by a 3 by 2 matrix
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WAEC pitfalls: Assuming matrix multiplication is commutative
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Worked example: Solving a 2 by 2 system by the matrix method
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WAEC pitfalls: Writing the coefficients out of order in the matrix
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WAEC pitfalls: Joining the plotted points of a curve with straight lines
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Worked example: Solving a quadratic graphically by adding a straight line
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Worked example: Testing the vertices of the feasible region
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WAEC pitfalls: Ignoring the non-negativity constraints
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WAEC pitfalls: Reading the quartiles off the wrong axis
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WAEC pitfalls: Dividing by the wrong number of items
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WAEC pitfalls: Comparing two pie charts of different totals directly
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Worked example: Rounding a number whose leading digits are zeros
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Worked example: The percentage error left by a rounded calculation
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WAEC pitfalls: Using the rate as a whole number instead of a decimal
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