In the following questions, a question is followed by data in the form of two statements labelled as I and II. You must decide whether the data given in the statements are sufficient to answer the questions.
If 'x' , 'y' are positive integers, is $$\sqrt{x^{2} + y^{2}}$$ an integer?
I) $$x : y = 1 : 2$$
II) $$x + y$$ is an multiple of 7
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