exam
Maths Puzzle
Numerical Ability
joe can paint all the rooms of a house in 20 hours it takes ross 60 hours to do the same thing. How long would it iake them if they worked together?
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exam Other Question
Graph the solution set of x <= 4.
simplifiy (2x2 + y2)(x - 2y) and 4x(3x2 + 2x + 1)
then add together.