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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6 comments:
its D
ans:::::::::::D
d
d
D
CORRECT ANS IS D
r/3 and s/3
therefore:
3*x1/3 and 3×2/3 (for some numbers x1 and x2)
now with 2s and 2r:
2*3*x1/? and 2*3*x2/?
the greatest number is 2*3=6
SO U ALL R CORRECT. CONGRATS
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