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1000 PS

presently we are in alpha stage , incase of typos please report at http://thousandps.blogspot.com/2009/11/bugs.html. we would be uploading all the 1000 Questions soon .

Thursday, November 19, 2009

PS 127

If 3 is the greatest common divisor of positive integers r and s, what is the greatest common divisor of 2r and 2s?
(A) 2
(B) 3
(C) 4
(D) 6
(E) 12

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