exam Maths Puzzle Numerical Ability

investigate the relationship between linear and quadratic sequences with reference to the sum of an arithmetic series

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exam Other Question

graph the line with slope 4 passing through the point (4,2) A hose can fill a swimming pool in 6 hours. Another hose needs 3 more hours to fill the pool than the two hoses combined. How long would it take the second hose to fill the pool?