exam Maths Puzzle Numerical Ability

the length of the side of a square is 3meters less than the length of the side of another square. The difference of their areas is 117 square meters. find the length of a side of each square.

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exam Other Question
A low calorie dounut has 90% fewer caloires than a regular donut. How many low calorie would you need to eat to take in as many calories as you would get from a regular donut? Graph 3x+2y=6