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This kind of problem is called permutations.

First, choose one of the 10 numbers: 10 choices here.

Then, choose one of the 9 remaining numbers: 9 choices, and etc.

10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 = 3628800.

Or, if repeats are allowed, then we have:

10 * 10 * 10 * 10 * 10 * 10 * 10 * 10 * 10 * 10 = 1010 = 10000000000.

Q: How many number combinations can you make with ten numbers from 1 to 10?

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You can make 5 combinations of 1 number, 10 combinations of 2 numbers, 10 combinations of 3 numbers, 5 combinations of 4 numbers, and 1 combinations of 5 number. 31 in all.

Only one.

There are 45 combinations.

There are 15 combinations.

There are 13,244 of them.

Related questions

You can make 5 combinations of 1 number, 10 combinations of 2 numbers, 10 combinations of 3 numbers, 5 combinations of 4 numbers, and 1 combinations of 5 number. 31 in all.

Only one.

14 * * * * * Wrong! There are 15. 4 combinations of 1 number, 6 combinations of 2 number, 4 combinations of 3 numbers, and 1 combination of 4 numbers.

9000

252 combinations, :)

35

The rearrangement of 5 figure numbers will be 5x4x3x2x1 which is 120 combinations, when you don't repeat a number.

There are 8,592,039,666 combinations of 6 numbers out of 138 numbers, like the numbers from 1 to 138.

There are 12,033,222,880 of them.

12,108,327

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.

There are 45 combinations.