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How many 4 digit combinations can be made using 0 through 9 and using each number only once?
Wiki User
∙ 13y ago
There are 900 possible combinations, starting with 1005....
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If the digits can't repeat . . .
The first can be 1, 2, 3, 4, 6, 7, 8, or 9 . . . 8 choices. For each one . . .
The second can't be 5 or the one used . . . 8 choices. For each one . . .
The third can't be 5 or the two used . . . . . 7 choices. For each one . . .
The fourth one is 5.
Total number of possibilities = (8 x 8 x 7 x 1) = 448.
If the digits can repeat:
The first can be any one of 9 choices (all except zero). For each one . . .
The second can be any of 10 choices. For each one . . .
The third can be any one of 10 choices. For each one . . .
The fourth is 5.
Total number of possibilities = (9 x 10 x 10 x 1) = 900.
Wiki User
∙ 13y ago
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How many different four digit combinations are there of the numbers zero through nine and using one number twice in the combination?
There are 360 of them.
How many two digit number combinations can you get using the number 1234 without repeating a digit?
There are twelve possible solutions using the rule you stated.
How many 4 digit combinations using 0-9 if each number may be used more than once?
10,000 combinations.
If using numbers 0 through 9 how many different 2 digit combinations can be made?
If there are no restrictions on duplicated numbers or other patterns of numbers then there are 10 ways of selecting the first digit and also 10 ways of selecting the second digit. The number of combinations is therefore 10 x 10 = 100.
What are the 5 digit combinations made using 1 through 9?
There are 59049 combinations, all the way from 11111, 11112 through 99998, 99999. There are too many to list here.
If using 7 single digit numbers how many different combinations can you get?
Number of 7 digit combinations out of the 10 one-digit numbers = 120.
How many combinations of 2 and 3 digit number using 4 and 8?
the answer is = first 2-digit number by using 48= 28,82 and in 3 digit is=282,228,822,822
How many different four digit combinations are there of the numbers zero through nine and using one number twice in the combination?
There are 360 of them.
How many two digit number combinations can you get using the number 1234 without repeating a digit?
There are twelve possible solutions using the rule you stated.
List the 4 digit combinations made using 1 through 9?
There are 9999 possible combinations starting from 0000 to 9999
Combinations in 10 digit pin code?
The number of combinations is the number of characters - in this case, 10 - raised to the power if the number of places. So using only the numerals zero through nine, and a 10-character PIN, there are 10 raised to the tenth power combinations, or 1,000,000,000 different possibilities.
How many 4 digit combinations using 0-9 if each number may be used more than once?
10,000 combinations.
How many 7 digit combinations can be made using the numbers 1 through 9?
It is: 9C7 = 36
If using numbers 0 through 9 how many different 4 digit combinations can be made?
66
If using numbers 1 through 8 how many different 4 digit combinations can be made?
15
If using numbers 1 through 4 how many different 4 digit combinations can be made?
10,000
If using numbers 0 through 9 how many different 2 digit combinations can be made?
If there are no restrictions on duplicated numbers or other patterns of numbers then there are 10 ways of selecting the first digit and also 10 ways of selecting the second digit. The number of combinations is therefore 10 x 10 = 100.
