Q: How many 3 digit numbers can be formed using the digits 0 1 2 3 4 5 6 7 8 9?

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27

24 different numbers.

More than one

If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.

6

Related questions

There are 60480 numbers.

There are 900 of them.

27

24 different numbers.

48 of them if digits may not be repeated. 100 if they can.

More than one

If repetition of digits isn't allowed, then no13-digit sequencescan be formed from only 5 digits.

6

Possible solutions - using your rules are:- 11,13,17,31,33,37,71,73 &77

Using the digits of 1345678, there are 210 three digit numbers in which no digit is repeated.

I take it that you want to make three digits numbers with 8,7,3, and 6 without repetition. The first digit cane be selected from among 4 digits, the second from 3 digits, the third digit from 2, hence the number of three digit numbers that can be formed without repetition is 4 x 3 x 2 = 24

None. Nine digit number cannot be formed using only five digits 1,2,3,4,5 in the case none of the digits can repeat. -------- Egad! I misread the question, apologies to the questioner. And thanks to Miroslav.