exam Maths Puzzle Numerical Ability

Solve the following quadratic equation.

x^2 = 7x

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exam Other Question

in a writing competition,the first place winner receives 1/2 of the prize money.the second runner up receives 1/4 of what the winner won. what was the total amount of prize money distributed if the winner receives $6,000? please need help with this one Calculate

(6x10^5)^2