exam Maths Puzzle Numerical Ability

Rectangular stage. One side of a rectangular stage is 2 meters longer than the other. If the diagonal is 10 meters , then what are the lengths of the sides?

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exam Other Question

The sum of two numbers is 39 and their difference is 7. What are the numbers? I need the coordinates of the x-intercept. I think it is either (-6, 0) or (-3,0)
I am not sure if either of these pairs are correct, or if I have them in right order. I am so confused.

Thank you, Ellen