book Maths Puzzle Numerical Ability

On a 50 to 1 ration of gas and oil, what is the amount of oil needed for 20 gallons of gas?

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book Other Question

2 men are walking at the same velocity but they pass a certain point 30 seconds apart. If their velocity is 2 m/s, how far from each other must they have began? A bag contains 4 red, 9 blue and 2 green marbles. Find the probability that a randomly selected marble is blue.

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4/15 3/5 2/15 9/13