exam Maths Puzzle Numerical Ability

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THe base of a ladder is 14ft away from the wall. The top of the ladder is 17feet from the floor. Find the length of the ladder to the nearest thousandth.

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solving equalities: 2x -10 >-10 rolly is 9 years younger than greg. in seven years, he will be two years more than one-half as old as greg. find their present ages.