exam Maths Puzzle Numerical Ability

square root of 1/2 show that it is irrational

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exam Other Question

i need help with this problem it is 1/2x-3/5=1/10+3/10 a)The Function C(X) = 25x + 80000 express the total cost C(x) in ( K $) of manufacturing x units of a product . if the maximum number of units which can be produced equals 20,000