exam Maths Puzzle Numerical Ability

Give an example of a number that is a real number, but not a rational number.

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exam Other Question

FIND AN EXPONENTIAL FUNCTION OF THE FORM f(x)=ba^x+c WITH y-INTERCEPT 2, HORIZONTAL ASYMPTOTE y=-2, THAT PASSES THROUGH THE POINT P(1,4). Two cars leave town at the same time going in opposite directions. One travels 55 mph and the other travels 48 mph. In how many hours will they be 206 miles apart?