[求助]求助，求助，数学题

yang8630

If n is a positive
integer, what is the value of the hundreds digit of 30ⁿ?

    

(1)
          30ⁿ > 1,000

    

(2)
          n is a multiple of 3.

    

                  

    

A. Statement (1) ALONE
is sufficient, but statement (2) alone is not sufficient.

    

B. Statement (2) ALONE
is sufficient, but statement (1) alone is not sufficient.

    

C. BOTH statements
TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

    

D. EACH statement
ALONE is sufficient.

    

E. Statements (1) and (2) TOGETHER are NOT
sufficient.

    Answer:  我选D，
    但我不确定的是（2）中“n
is multiple of 3”,那么n可不可以为0呢？

[此贴子已经被作者于2008-10-23 1:58:44编辑过]