exam Maths Puzzle Numerical Ability

Please help me figure the following problem out. Thank you

One leg of a right triangle is 12 cm longer than the other leg. The length of the hypotenuse of the triangle is 36 cm. Find the length of the two legs.

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exam Other Question

Find the decimal equivalents for the following mixed number

7 and 3/4
help on this question
For the following set of data, test the hypothesis that the average is 10. Run a test of that hypothesis and present the conclusion.
x
8.9
9.7
10.3
8.5
10.4
9.3
9.8
7.1
10.6
11.1