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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 .

Monday, November 23, 2009

PS 190

The numbers in which of the following pairs do NOT have a pair of distinct prime divisors in common ?
(A) 10 and 20
(B) 12 and 18
(C) 24 and 32
(D) 21 and 63
(E) 22 and 88

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