Q: How many four digit numbers can be formed from digits 1 2 3 4 if repeated is allowed and how many are odd numbers?

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500

It is 120 if the digits cannot be repeated.

4*3*2*1 = 24

6*5*4*3*2*1=720

That would be 4! = 4 * 3 * 2 * 1 = 24

Related questions

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.

This permutation problem depends on whether the numbers are allowed to be repeated. If they are, there are a possible 9999 numbers, starting with 0001 and running sequentially to 9999. If they are not allowed to be repeated, there are a possible 5040 combinations.

3x3x3=27

36

6*6*3 = 108 numbers.

4*3*2*1 = 24

6*5*4*3*2*1=720 possible numbers