exam Maths Puzzle Numerical Ability

1 - (x over x+2) over 1+ 1/x

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6. Can you find the total surface area of a pyramid? Telephoto Lens. Use the formula 1 / f = 1 / o + 1 / i to find the image distance i for an object that is 2,000,000 mm from a 250-mm telephoto lens.