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1. 200% of x = 400% of y 2. xy is the square of a positive integer

I get E.

1) we don't have value of y,so insufficient. 2) xy can be 1,4,9,... combining, x/y = 2, now if x is a fraction y is also a fraction, in that case xy would not be a square of a positive integer, so x and y are integers. I could not find any combination where x/y = 2 and xy is a square of a positive integer.

1. 200% of x = 400% of y 2. xy is the square of a positive integer

I get E.

1) we don't have value of y,so insufficient. 2) xy can be 1,4,9,... combining, x/y = 2, now if x is a fraction y is also a fraction, in that case xy would not be a square of a positive integer, so x and y are integers. I could not find any combination where x/y = 2 and xy is a square of a positive integer.

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