exam Maths Puzzle Numerical Ability

A farmer drives to town at 40km/h, spends 1.5 hours in town and returns home travelling at 30km/h. If he has been away from home a total of 5 hours, how far is hes farm from town?

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exam Other Question

Find the polynomial function of the lowest degree with the rational coefficients that has the given numbers as some of it's zero's.
3-sqrt(3),1-i.
I have worked on this and belie please help to solve this one I now have grey hair
given f(x)=5x to the 2nd-3x+1, find f(-2). thank you