exam Maths Puzzle Numerical Ability

Mercy can prepare a manuscript in 6 hours. Eunice can prepare it in 4 hours. How Long would it take them to preapre the manuscript together?

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exam Other Question

The sum of the present ages of Eric nd his father is 58 years. In 10 years, his father will be twice as old as Eric will be at that time. Find their present ages. Simplify. Assume x represents a positive number.

square root of 45x^4