exam Maths Puzzle Numerical Ability

If y varies inversely as x^2, and y=2 when x=4, what is the constant of variation?

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exam Other Question

One carpenter can complete a kitchen in 8 days. With the help of another carpenter, they can do the job together in 4 days. How long would it take the second carpenter if he worked alone? The quotient of a number and 6 is 5 more than twice the number. Find the number