exam Maths Puzzle Numerical Ability

A department store advertised electric shavers at a sale price of $36. If this is a 20% discount, what was the original price?

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exam Other Question

how many roots does x^6-28x^3+27=0 have? (hint: trinomial expression, use y = x^3) Find three consecutive integers where the sum of the first two equals the square of the third minus 146.