book Maths Puzzle Numerical Ability

Is it correct to say the reciprocal of .25 is 1/.25 or do you convert the decimal to a fraction 25/100 and then flip?

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A plane flies 420 miles with the wind and 350 miles against the wind in the same length of time. If the speed of the wind is 23 mph, what is the speed of the plane in still air? Please Help Me ! This is for a discussion board...



While the radical symbol is widely used, converting to rational exponents has advantages. Explain an advantage of rational