1,483 prompts matching "IGCSE-style teach me: A three-set survey problem solved with a Venn diagram"
Worked example: Finding the height of a mast from its angle of elevation
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WAEC pitfalls: Taking the angle from the vertical instead of the horizontal
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Worked example: Using the power law to simplify a logarithmic expression
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WAEC pitfalls: Treating the logarithm of a sum as the sum of logarithms
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Worked example: The shape of a logarithmic graph
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WAEC pitfalls: A negative characteristic written the wrong way
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Worked example: Bringing a negative number into the right residue class
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WAEC pitfalls: Reducing to a residue outside the permitted range
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Worked example: The formula for the number in a union
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WAEC pitfalls: Counting the overlap twice in a union
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Worked example: The converse, inverse and contrapositive
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Worked example: A tautology and a contradiction
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WAEC pitfalls: Filling a truth table column out of order
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Worked example: Changing the subject when the letter occurs on both sides
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WAEC pitfalls: Applying an inverse operation to only part of a side
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Worked example: Using the constant to predict a further value
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WAEC pitfalls: Treating a partial variation as a direct one
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WAEC pitfalls: Cancelling a factor containing the unknown and losing a root
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Worked example: Substituting into the quadratic formula carefully
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WAEC pitfalls: Dropping the plus-or-minus from the formula
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