exam Maths Puzzle Numerical Ability

Can someone please help me out with this: I am supposed to find the length x. Express your answer in simplified radical form. the triangle is 51 ft on one side, 45 ft on the other side, then there is x.

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exam Other Question

I am thinking of three consecutive positive numbers. If i multiply the first with the third and then add the second, the result is 41. Let x be the smallest number. I tried to do this three times, but get lost in all the steps. Can you help me?

C(10,5)x C(15,8)
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C(12,11)