exam Maths Puzzle Numerical Ability

Factor completely.

16m squared - 49n squared

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exam Other Question

two numbers are happy twins if they are consecutive happy numbers. find a pair of happy twin numbers. there is a pair that is less then a 100. Lynn and Laws knew that the confection should be exactly 8% sugar. It was to be made using one component that was 5% sugar and another that was 20% sugar. How much of each should they use to get 800 ml of the confection?