<p>If n distinct planes intersect in a line, and another line l intersects one of these planes in a single point, what is the least number of these n planes that l could intersect?</p>
<p>(A) n
(B) n - 1
(C) n - 2
(D) n/2
(E) (n - 1)/2</p>
<p>Answer is choice (B). How would you arrive that?</p>
<p>No homework help posts allowed.</p>
<p>Actually, this isn’t homework. It’s a math 2 sat II question, and I wasn’t getting answers in the subject test section, so I thought I’d try here.</p>
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<p>Since all of the planes intersect, none of them are parallel. If you draw a line parallel to one of the planes, it won’t intersect that plane, but it must intersect every other plane.</p>