exam Maths Puzzle Numerical Ability

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If you stand in shallow water and look at an object below the surface of the water, the object will look farther away from you than it really

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Write the factors for each of the following numbers. 48, 72, 93 and 126. The sum of the present ages of Eric nd his father is 58 years. In 10 years, his father will be twice as old as Eric will be at that time. Find their present ages.