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In combinations, the order of the digits does not matter so that 12 and 21 are considered the same.

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Q: How many 2 digit combinations can be made from 0 to 9 digits?
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How many 4 digit combinations can be made from 6 digits?

If the 6 digits can be repeated, there are 1296 different combinations. If you cannot repeat digits in the combination there are 360 different combinations. * * * * * No. That is the number of PERMUTATIONS, not COMBINATIONS. If you have 6 different digits, you can make only 15 4-digit combinations from them.


How many 2 digit combinations can be made with 2 digits?

Only one.


How many 5 digit combinations are there in six digits?

about 1,0000000000000


How many 4 digit combinations can be made with 4 digits?

9,000 - all the numbers between 1,000 and 9,999 inclusive. * * * * * NO. Those are PERMUTATIONS, not COMBINATIONS. Also, the question specified 4 digit combinations using 4 digits. The above answer uses 10 digits. If you start with 4 digits, you can make only 1 combination.


How many 4 digit combinations can be made using numbers 1 2 3 4 6?

120 combinations using each digit once per combination. There are 625 combinations if you can repeat the digits.


How many 6 digit combinations can be made from digits 0 to 9?

10C6 = 10*9*8*7/(4*3*2*1) = 210 combinations.


How many 4 digit combinations are made out 2468?

Only one: 2468. The order of the digits in a combination does not make a difference.


What combinations can you make with numbers 1 4 7 2 5 8 0?

Assuming the digits cannot be repeated, there are 7 combinations with 1 digit, 21 combinations with 2 digits, 35 combinations with 3 digits, 35 combinations with 4 digits, 21 combinations with 5 digits, 7 combinations with 6 digits and 1 combinations with 7 digits. That makes a total of 2^7 - 1 = 127: too many for me to list. If digits can be repeated, there are infinitely many combinations.


How many 9 digit combinations are there from 1 to 20-?

There are 167960 9 digits combinations between numbers 1 and 20.


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.


How many combinations in 3879?

There are infinite combinations that can make 3879


How many combinations can you get from a 3 digit code from 1 to 3?

Allowing repetitions, there are 9 combinations. Without repeated digits, there is only one combination of 3 digits from 3.