exam Maths Puzzle Numerical Ability

What is -9 - the square root of 108 over 3 equal?

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exam Other Question

A bag contains 3 purple marble and 7 blue. Each marble selected is not put back into the bag before the next marble is selected. Find the probability of selecting a blue marble then a purple marble. can you help solve this problem please.

3x+5/3x+2-4-2x/3x^2+8x+4=x+4/x+2