book Maths Puzzle Numerical Ability

David can type a 50 page paper in 8 hours. Last month David and Andy together typed a 50 page paper in 6 hours. How long would it take Andy to type a 50 page paper on his own?

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book Other Question

inequalities and thier graphs:solving one step equations and inequaliites:

trying to help teenage child with problems getting confused..

1)graph.... -7 > w ? Shut your eyes and try to imagine a perfect ice cube. If you�re good at visualizing, you may be able to �see� the edges and faces that are positioned on the far side of the cube.