exam Maths Puzzle Numerical Ability

Find the LCM.

y^3 + 8y^2 + 16y, y^2 - 8y

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exam Other Question

How many gallons of a 40% solution must be mixed with 96 gallons of 60% solution to obtain a 52% solution? In a town election, the winning candidate had 220more votes than the loser. If 810 votes were cast in all, how many votes did each candidate receive?

this is what I got so far...Am I on the right track? if so, what do I do next

220*x+y=810