请教Prep数学

161.
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In the xy-coordinate plane, line m and line k intersect at the point (4, 3).  Is the product of their slopes negative?

(1)  The product of the x-intercepts of lines m and k is positive.

(2)  The product of the y-intercepts of lines m and k is negative.

答案：C

Is the integer n odd?

(1) n is divisible by 3.

(2) 2n is divisible by twice as many positive integers as n.

答案: B,

题目(2)说啥意思，不懂