1,044 prompts matching "The identity that n choose r equals n choose n minus r"
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Common Mistakes: Checking a completed square by expanding it again
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Show All Working: Forming an equation whose roots are three alpha and three beta
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Common Mistakes: A word problem giving one linear and one quadratic equation
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Show All Working: Adding and subtracting two polynomials
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Show All Working: A remainder of nought, and what it means
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Show All Working: Factorising a polynomial with fractional roots
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Common Mistakes: Factorising fully, and knowing when to stop
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Common Mistakes: A cubic equation arising from a volume problem
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Show All Working: Translating an English sentence into logical symbols
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Common Mistakes: Translating a symbolic statement back into English
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Show All Working: Why a conditional and its converse are not equivalent
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Common Mistakes: Deciding between tautology, contradiction and contingency
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Show All Working: Arrangements of boys and girls alternately
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Common Mistakes: Arranging objects when some must stay in a fixed order
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Common Mistakes: Comparing a line arrangement with a circular one
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Common Mistakes: A probability found by counting arrangements
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IGCSE Additional Maths Y11: An angle given as a multiple of pi — Common Mistakes
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IGCSE Additional Maths Y11: A composite region built from a rectangle and a sector — Common Mistakes
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IGCSE Additional Maths Y11: Finding every angle in a range with a given sine — Common Mistakes
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IGCSE Additional Maths Y11: Permutations counted by choosing first and arranging after — Common Mistakes
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