exam Maths Puzzle Numerical Ability

A number, half of that number, and one-third of that number are added. The result is 22. What is the original number?

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exam Other Question

When solving a quadratic equation you have 0,1,2 solutions. What does this mean "graphically? How do you simplify 4In2 + 1/2 In4 - In8 to a single logarithm?