Best Answer

4*3*2*1 = 24.

The actual numbers are

1234

1243

1342

1324

1423

1432

2134

2143

2314

2314

2413

2431

3124

3142

3234

3243

3413

3431

4321

4312

4213

4231

4123

4132

Q: How many 4-digit numbers can be formed by the digits 1 2 3 4 using the digits once?

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99999

There are 3,265,920 numbers that can be formed using all the digits. The answer to the question will depend on which one of these.

15 of them.

27

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

Related questions

99999

There are 3,265,920 numbers that can be formed using all the digits. The answer to the question will depend on which one of these.

There are 60480 numbers.

There are 4^6 = 4096 such numbers.

8.

If the digits are all different then 18. Otherwise, 192.

There are 900 of them.

15 of them.

Assuming each of the given digits can be used only once, the answer is 24. If not, the answer is infinity.

27

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

6