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OpenStudy (anonymous):
Let U, the universal set, consist of all the positive rational numbers (or positive fractions). Let A be the set defined by A = {p/q | p,q are odd naturals and q is nonzero}. Find a set B that satisfied the following 3 conditions: 1) B is a subset of A', the complement of A. 2) B has exactly 255 proper subsets. 3) No fraction in B is greater than 1.
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