Answers

2015-10-22T15:11:16+08:00
5 ways can be written on the first digit.
5 ways can be written on the second digit.
5 ways can be written on the third digit.
5 ways can be written on the fourth digit.
5 ways can be written on the fifth digit.

5 ways x 5 ways x 5 ways x 5 ways x 5 ways or 5^5 ways

Therefore, there are 3125 numbers.




- D. E.

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