Q: How many 6 digit numbers can be formed form the digits 123456 if no digits can be repeated?

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6*6*3 = 108 numbers.

Assuming no repeated digits, lowest first, 20; in any order 120; Allowing repeated digits: 216

1 set

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

There are 5! = 120 such numbers.

Related questions

6*6*3 = 108 numbers.

192 ways

Assuming no repeated digits, lowest first, 20; in any order 120; Allowing repeated digits: 216

24

500

There are 5*4*3 = 60 such numbers.

1 set

It is 120 if the digits cannot be repeated.

There are 7,290 different 4-digit numbers that can be formed from the digits 1-9 without repetition.

3x3x3=27

36

4*3*2*1 = 24