单项选择题

The integer n is a multiple of both 5 and 3. Which of the following is (are) true
I. n is odd.
II. n=30.
III. n is a multiple of 15.

(A) III only
(B) I and II only
(C) I and III only
(D) II and III only
(E) I, II, and III
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单项选择题
Directions for Quantitative Comparison Questions: Some of the following questions give you two quantities, one in Column A and one in Column B, Compare the two quantities and choose one of the following answer choices:（）

A．if the quantity in Column A is greater;
B．if the quantity in column B is greater;
C．if the two quantities are equal;
D．if you cannot determine the relationship based on the given information
单项选择题
Which of the following represents the ratio of the hours teenagers spend on Work School to the hours teenagers spend on all activities（）

A．17:24
B．7:17
C．7:24
D．24:17
E． 24:7
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