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Q: If using numbers 0 through 9 how many different 4 digit combinations can be made?
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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 different 9 digit combination can be made using numbers one through nine?

9^9 = 387420489 different digit combinations.


If using numbers 1 through 4 how many different 4 digit combinations can be made?

10,000


If using numbers 1 through 8 how many different 4 digit combinations can be made?

15


If using numbers 0 through 9 how many different 4 digit combinations can be made and what are they?

2304


How many different combinations are possible multiplying 8 different 7 digit numbers?

56 combinations. :)


How many 7 digit combinations can you have if you can only use the numbers 0 through 9 once each?

10!/3! = 604800 different combinations.


How many different 3 digit combinations can be made using numbers one through nine?

Through the magic of perms and coms the answer is 729


What are all the number combinations for the numbers 1 through four?

This question needs clarificatioh. There are 4 one digit number combinations, 16 two digit combinations, ... 4 raised to the n power for n digit 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.


How many 3 digit combinations numbers one through nine?

9!/6!, if the six different orders of any 3 digits are considered distinct combinations.


What are the different combinations of three digit numbers using 0-9?

9


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 5 digit combos in 30 numbers?

The answer will depend on how many digits there are in each of the 30 numbers. If the 30 numbers are all 6-digit numbers then the answer is NONE! If the 30 numbers are the first 30 counting numbers then there are 126 combinations of five 1-digit numbers, 1764 combinations of three 1-digit numbers and one 2-digit number, and 1710 combinations of one 1-digit number and two 2-digit numbers. That makes a total of 3600 5-digit combinations.


How many 5 digit combinations for numbers 1- 25?

There are 9 1-digit numbers and 16-2 digit numbers. So a 5 digit combination is obtained as:Five 1-digit numbers and no 2-digit numbers: 126 combinationsThree 1-digit numbers and one 2-digit number: 1344 combinationsOne 1-digit numbers and two 2-digit numbers: 1080 combinationsThat makes a total of 2550 combinations. This scheme does not differentiate between {13, 24, 5} and {1, 2, 3, 4, 5}. Adjusting for that would complicate the calculation considerably and reduce the number of combinations.


If using numbers 1 through 9 how many different 4 digit combinations can be made with no restrictions on order or repeats?

Each digit can appear in each of the 4 positions. There are 9 digits, therefore there are 9⁴ = 6561 such combinations.


What are every possible 4 digit combinations of the numbers 0 through 9?

10,000


How many 10 digit combinations are there for the numbers 0 through 9?

Exactly 3,628,800, or 10!.


How many 6 digit combinations are there in 20 numbers?

There are 38760 combinations.


How many 7 digit combinations can be made using the numbers 1 through 9?

It is: 9C7 = 36


How many 7 digit combinations are there for numbers 1 through 9?

that would be 9 to the 7th power i believe.


How combination in a 9 digit number?

There are different numbers of combinations for groups of different sizes out of 9: 1 combination of 9 digits 9 combinations of 1 digit and of 8 digits 36 combinations of 2 digits and of 7 digits 84 combinations of 3 digits and of 6 digits 126 combinations of 4 digits and of 5 digits 255 combinations in all.


How many 4 digit combanations using the numbers 1-7?

There are 840 4-digit combinations without repeating any digit in the combinations.


How many 5 digit combinations are there from 1-20?

There are 1140 five digit combinations between numbers 1 and 20.


How many 10 digit phone numbers are possible?

Without restrictions, it was would numbers 000-000-0000 through 999-999-9999. So that would be 9,999,999,999 + 1 = 10 billion different 10-digit phone numbers. Ex: If there existed single digit phone numbers, there would be 10, because the digits are 0 through 9. If there existed only double digit phone numbers, then it would be 00 through 99 which would be 100 total two-digit numbers. Therefore the total possible combinations for an X digit phone number would be: 10^X