exam Maths Puzzle Numerical Ability

Please help to :

Evaluate

a^2 - b^3(a - b) if a = 1/3 and b = - 1/2

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exam Other Question

Definition: If y is a real number, then y to 1st power = _______ Here is a tiring problem. The diameter of a car tire is approximately 60 centimeters. The warranty is good for 70,000 km. About how many revolutions will the tire make before the warranty is up? More than a million? A billion?