exam Maths Puzzle Numerical Ability

Find all numbers for which the rational expression is undefined.

9^3-5q/9^2-6y

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exam Other Question

(28b^3+20b^2+28b+43)/(4b+4)= Please help me solve the problem;

Find the nos. of edges in a pyramid with seven faces. ( Is the pyramid base also included as one of the faces?)

Thanks for your help.

Rup