book Maths Puzzle Numerical Ability

Hi, I want to work out a possible profit percentage. Total outlay is £12092.07 and total Return is £13824. Profit = £1731.93

With Regards,

Oliver Davies.

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The hypotenuse of a right triangle is 6m long. One leg is 1m longer than the other find the length of the shorter leg.
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use the discriminant to determine how many real number solutions the quadratic equation -4j2 + 3j - 28 = 0 has. please and thank you!!!