exam Maths Puzzle Numerical Ability

Divide
5x^2-x^4+3x+x^4 by x+1 (use long division)

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exam Other Question

A company payroll is prepared by 2 computers in 13 and 1/3min. W orking alone, the faster of the 2 computers can prepare the payroll in 20 minutes. How much time does the slower computer alone require to prepare the payroll? please help me

1. if a flywheel is 1 m in diameter and if a belt over the wheel is rotating at the rate of 1000 m per minute, find the number of revolutions of the wheel per minute.