exam Maths Puzzle Numerical Ability

the quotent when 3 more than a number is divided by 3 less than that same number

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exam Other Question

Check wether the given number is a solution of the inequality.
2y-21<0.9;8
The problem is to use the equation p=7t^2+2500: 2500 is current population, to find how many years it would take for the population to reach 12,000.round to the nearest whole year when necessary.