exam Maths Puzzle Numerical Ability

find four consecutive even intergers such that six times the sum of the first two exceeds twice the sum of the first and the forurth by 416

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exam Other Question

how to solve x2+y2+6x-4y12=0 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?