(49 x 48 x 47 x 46 x 45 x 44)(6 x 5 x 4 x 3 x 2) = 13,983,816
There are 360 of them.
You can select 9 numbers for the first digit, 8 numbers for the second digit, and 7numbers for the third digit; so 504 (e.g. 9*8*7) different three digit numbers can be written using the digits 1 through 9.
There is only one combination since the order of the numbers in a combination does not matter.
* 10^10 * = ten billion (US), or * ten thousand million (UK)
Any multiple of 36 will do. Multiply 36 by different numbers, until you get a 5-digit number.Any multiple of 36 will do. Multiply 36 by different numbers, until you get a 5-digit number.Any multiple of 36 will do. Multiply 36 by different numbers, until you get a 5-digit number.Any multiple of 36 will do. Multiply 36 by different numbers, until you get a 5-digit number.
There are 360 of them.
You can select 9 numbers for the first digit, 8 numbers for the second digit, and 7numbers for the third digit; so 504 (e.g. 9*8*7) different three digit numbers can be written using the digits 1 through 9.
Just think of how many possibilities you have for each digit. 10x9x8x7x6x5x4x3x2 or 10 factorial is 3 628 800.
There is only one combination since the order of the numbers in a combination does not matter.
There are 7,290 different 4-digit numbers that can be formed from the digits 1-9 without repetition.
* 10^10 * = ten billion (US), or * ten thousand million (UK)
10,000
5,040
66
10,000
15
5 x 10 x 5 = 250 different numbers, assuming there is no limit to each digits' use.