exam Maths Puzzle Numerical Ability

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Solve (h=16t^2 + vt + s) for t

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exam Other Question

There are 3 red and 7 black marbles in a bag. If I am blindfolded, how many times must I reach in and pull out a marble before I am sure it is a black one? How do you graph this equation? 3x-y<6
X > 1
Y < 3