exam Maths Puzzle Numerical Ability

x>=0

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Tom and David have 480 marbles between them. Tom arranges them in columns with 6 in each column, and David arranges them in columns with 9 in each column. The total number of col Suppose that lateral faces VAB, VBC, and VCA of triangular pyramid VABC all have the same height drawn from V. Let F be the point in base ABC that ins closest to V, so that VF is t