exam Maths Puzzle Numerical Ability

If it takes 6 workers to paint a room in 14 days, how many workers does it take to paint a room in 21 days?

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exam Other Question

Any help here I am the worst with math problems.

Find the product of (x2 - 3x + 5) with the quotient of (18x6 - 27x5 - 9x3) � 9x3. Solve x^2-2x=24 by factoring.

Thanks