exam Maths Puzzle Numerical Ability

A recipe calls for 1 1/3 tablespoons of butter and serves 6 people.If you wish
to cook this recip for yourself,how much butter should you use?

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exam Other Question

Sketch the graph of f(x)=x 2 squar -9 and find the interval(s) (if any) where f(x)=0

Thank you
Multiply out

(x+6)(x^3-x^2-5x+1)

Please help