Problem Solving

试题详情

题目:

If Whitney wrote the decimal representations for the first 300 positive integer multiples of 5 and did not write any other numbers, how many times would she have written the digit 5 ?

选项:

A、150
B、185
C、186
D、200
E、201

答案:

E

提问:

请老师讲一下思路吧
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