exam Maths Puzzle Numerical Ability

2x^2 - x - 3/3x^2 + 7x +4 . 3x^2 - 11x -20/4x^2 - 9

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exam Other Question

How many numbers between 100 and 200 (Inclusive) have an even number of factors?

Is there a formula for figuring this out or some sort of pattern? Thankyou 9-3w+w=13 i need help with this