exam Maths Puzzle Numerical Ability

(x^2-3)(x^2+3)

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exam Other Question

cedric wants to buy one of four diffrent kinds of new shoes. each brand of shoe is avalible in two colors, black and white. how many diffrent shoe choices does cedric have?
i hope you can help
thanks a bunch!
The sum of a number and its reciprocal is 10/3. What is the number?