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NO.280
困难
00:00
本题平均耗时:2分38秒
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正确率:67%

Sid intended to type a seven-digit number, but the two “3” he meant to type did not appear. What appeared instead was the five-digit number 52115. How many different seven-digit numbers could Sid have meant to type?

10

16

21

24

27

Select one answer choice.

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