List Tconsists of 30 positive decimals, none of which is an integer, and the sum of the 30 decimals is S.The estimated sum of the 30 decimals, E, is defined as follows. Each decimal in T whose tenths digit is even is rounded up to the nearest integer, and each decimal in Twhose tenths digit is odd is rounded down to the nearest integer; E is the sum of the resulting integers. If -Iof the decimals in Thave a tenths digit that is even, which of the following is a possible value of E- S?
I. -16
II. 6
III. 10
(A) I only
(B) I and II only
(C) I and III only
(D) II and III only
(E) I, II, and III
答案：B
【数学】
If w, x, y, and z are integerssuch that 1 < w < x < y < z and wxyz = 462, then z =?
A. 7
B. 11
C. 14
D. 21
E. 42
参考答案：B
题目翻译：wxyz大于一整数且依次从小到大，商是462，求z。
题目全解：分解462=2*3*7*11,选B。
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