exam Maths Puzzle Numerical Ability

A plane flies 300 miles with a tail wind in 1 hour. It takes the same plane 2 hours to fly
the 300 miles when flying against the wind. What is the plane�s speed in still air?

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exam Other Question

9. Find the slope, if it exists, of the line containing the pairs of points.
(3,2) and (8,-9). The slope m=
10. Solve: 5/4x + 1/8x = 5/8 + x
The solution is X=.
12: Train A an What is the answer to this equation? 3^2+2(3+1)^2=