exam Maths Puzzle Numerical Ability

11 years ago Hye was four times as old as her brother. In 1 year she will be twice as old as he is. What are their ages now?

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exam Other Question

Please solve. |x-2| >= -4

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200ft to make a rectangle garden against the side of a barn.
Find the maximum area by finding the vertex (h,k).
And k is the max.