exam
Maths Puzzle
Numerical Ability
Rewrite the expression x^3 - 2x^2 y + x y^2 so that it is easy to calculate the its value without a calculator when x= 21 and y = 19
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exam Other Question
what is the answer to this question [[[x]-2]-2]<=1
Solve the equation
w^3 + 5w^2 - w = 5