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https://padlet.com/rdownes/Algebra1
https://padlet.com/rdownes/Algebra2
https://padlet.com/rdownes/Algebra3
https://padlet.com/rdownes/Algebra4
https://padlet.com/rdownes/Algebra5
https://padlet.com/rdownes/Algebra6
https://padlet.com/rdownes/Algebra7
https://padlet.com/rdownes/Algebra8
https://padlet.com/rdownes/Algebra9
https://padlet.com/rdownes/Algebra10
https://padlet.com/rdownes/Algebra11
https://padlet.com/rdownes/Algebra12

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A19d - Solving two simultaneous equations (linear and curve) graphically

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A20a - Finding approximate solutions to equations numerically using iteration

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A21a - Representing simple situations using algebraic expressions or formulae

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A21b - Deriving and solving an equation or simultaneous equations to describe a situation

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A22a - Solving linear inequalities in one variable

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A22b - Solving linear inequalities in two variables

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271 is not a square number, and therefore has an even number of factors. Each factor pair must consist of one factor less than the square root of 271 and one greater. (If both were less, the product would be less than 271; if both were greater, then the product would be greater.) Since 271 has only one factor greater than 16, and this factor is 271 itself, it is prime.

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271 is not a square number, and therefore has an even number of factors. Each factor pair must consist of one factor less than the square root of 271 and one greater. (If both were less, the product would be less than 271; if both were greater, then the product would be greater.)