exam Maths Puzzle Numerical Ability

One number is 12 more than another. the sum of the smaller number and twice the larger number is 39. Find the larger number.

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exam Other Question

Ok, the polynomial f(x) divided x-3 results in a quotient of x^2+3x-5 with a remainder of 2. What is f(3)? Please help me find the volume, to the nearest tenth, of a pyramid that is 6 feet tall and whose base is an equilateral triangle with sides each 10 feet long?