1,483 prompts matching "Forgetting to swap the leading diagonal when inverting"
Find my error: Dividing by a fraction by inverting it
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Real-life question: Average speed when a journey has two legs at different speeds
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Worked example: Spotting a misleading scale on a chart
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Quiz me: The place values of a number written in base five
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Spot my mistake: Converting a base eight number to base ten
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Quiz me: Reading the remainders in the right order
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Spot my mistake: Subtracting in a base other than ten, with borrowing
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Quiz me: Why subtracting indices divides powers of the same base
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Spot my mistake: Deriving the zero index from the division law
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Quiz me: Writing both sides to a common base
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Quiz me: The sine, cosine and tangent ratios
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Quiz me: The exact ratios for 45 degrees
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Spot my mistake: The sign of each ratio in the four quadrants
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WAEC pitfalls: Quoting a special angle ratio as a decimal when an exact value is asked for
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Spot my mistake: The law for the logarithm of a quotient
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Quiz me: Reducing a number to its residue modulo n
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Quiz me: The negation of a statement
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Practice set: Conjunction, and when it is true
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Quiz me: The truth table for negation
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Quiz me: Making a letter the subject by one inverse operation
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