exam Maths Puzzle Numerical Ability

The greater of two comsecutive even integers is 20 more than twice the smaller. Find the integers.

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Let f(x)=x^3-8x^2+17x-9. Use the factor theorem to find other solution to f(x)-f(1)=0, besides x=1. my answer is 2,5 is that riht. thanks for checking for me. What is the equation for the surface area of an open box? For an example a box with dimensions 2=h, 4=w, 6=l