1,334 prompts matching "Quiz: Why one person is fixed in a circular arrangement"
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Spot My Mistake: Orders that make a product possible one way round but not the other
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WAEC Prep: When Cramer's rule is quicker than elimination
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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WAEC Prep: A three-unknown system arising from a word problem
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WAEC Prep: The newton, and how it is defined
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Practice: Why the forces must sum to nought in two perpendicular directions
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WAEC Prep: Calculating a moment as force times perpendicular distance
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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Spot My Mistake: Finding two unknown tensions from three forces in equilibrium
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WAEC Prep: The four conditions a binomial situation must satisfy
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Spot My Mistake: The probability of exactly r successes in n trials
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WAEC Prep: A Poisson distribution taken over a different length of interval
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Practice: The probability of exactly r events in a Poisson distribution
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WAEC Prep: Comparing the mean with the variance of a binomial distribution
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