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Q: How many 3 digit numbers can be formed from the digits 1234?

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4*3*2*1 = 24

256

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

There are 4^6 = 4096 such numbers.

1234, 2637, 7777, 2727 are examples of a four digit number. So any random four numbers are four digits.

24

smallest=1234 greatest=4321

Twelve of them.

9876 and 1234

1234

Any 3 out of 4 = 4. Each set can be arranged 6 ways so 24 different numbers.

9,999 different combos well 10,00 if you add 0 in with it

4 x 3 x 2 ie 24

With repeats: 4×4 = 16; Without repeats: 4×3 = 12.

a 8-digits palindromic number is a number consisting of a 4-digits number written and then written backward, i.e. 1234 4321 so there are as many palindromic 8-digits numbers as 4-digits numbers so from 1000 to 9999, so there are 8999 palindromic 8 digits number (I assumed that 00011000 is not to be considered as a valid 8 digit number)

1234

24 = 4*3*2*1

1234, if you don't repeat any.

There are 4 ways to chose the first digit. Then because there is to be no repetition, there are 3 ways to choose the second. This means that there are 4 x 3 ways of setting down the first two digits 12 _ _ 13 _ _ 14 _ _ 21 _ _ 23 _ _ 24 _ _ 31 _ _ 32 _ _ 34 _ _ 41 _ _ 42 _ _ 43 _ _ .... now you can take it from there.

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

A lot. And there is akways the code. 1234

1234

Nope, look at 1000, this is a 4 digit number and we can't list it with 1,2,3, and 4

1234 billion

Instead of reading the numbers from left to right (1234) read them from right to left (4321).