exam Maths Puzzle Numerical Ability

The larger of two numbers exceeds twice the smaller by 17. If the larger number is divided by the smaller number, the quotient is 3 and the remainder is 7. Find the two numbers.

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exam Other Question

A tank holds 80 gallons of chemical solution. Currently the solution has a strength of 30%. How much of this should be drained and replaced with a 70% solution to get a final strength of 40%? Given the function m(w)= 3w-2/ 2w+1. Write w as a function of m.