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Six combinations: 123, 132, 213, 231, 312, 321

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Q: How many combinations of three digits can be made from numbers 1 - 3?

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6

10

There are 720 combinations if you use each of the digits only once per combination.

3! or 6 combinations can be made from three distinct numbers. For this example they are: 345, 354, 534, 543, 435, 453.

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

Related questions

6

10

32C3 = 4960

45

Assuming you are treating each number as a number and not as an individual unit, the numbers you can make from these digits are 899, 989 and 998.

017, 071, 107, 170, 701, 710. 6 combinations

10

9*9*9 = 729 using the digits 1 to 9 and 2*9 using 10 and another digit. 749 in all.

-8

We notice that you said "combinations of three digits". You didn't say "3-digit numbers".There are (10 x 10 x 10) = 1000 combinations of three digits.The only combinations of 3 digits that form numbers less than 15 are 000, 001, 002, . . .012, 013, and 014. There are 15 of those.So the remaining (1000 - 15) = 985 are all larger than 15.

depends on your answer

There are 720 combinations if you use each of the digits only once per combination.

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