exam Maths Puzzle Numerical Ability

You are driving on a road that has a 6% uphill grade. This means the slope of the hill is 6 over 100. Approximate the amount of verticle change in your position if you drive 200 feet.

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exam Other Question

A chemist is making a solution that is to be 55% chlorine. He has one solution that is 40% chlorine and another that is 65% chlorine. He wants 100 liters of the final solution. How much of each should he mix? Use cross products to determine whether each of pair of ratios forms a proportion:

4/9, 12/27

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