exam Maths Puzzle Numerical Ability

If x-y=6 and 3x(squared)+3xy-6y(squared)=60, then 9x+18y=?

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Using a calculator, find log 1000 where log means to the base of 10. How do I solve this?
Explain in your own words how to factor a polynomial of the form ax2 + bx + c when a is not equal to 1. Describe both the grouping approach as well as reversing FOIL. Contrast the