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Earn +20 ptsQ: How many 3 digit number can be using 123?
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3 digit number with 3 different digits?
123
How many four digit numbers can be formed out of 123 if a digit can be repeated?
There are 3 values (1, 2, 3) for each of the 4 digits. Therefore, there are 3*3*3*3 or 81 four digit numbers that can be formed.
How many 3 digit combination can you get from 123?
3! = 1 x 2 x 3 = 6. The same for any three different digits - you have 6 possible combinations. * * * * * NO! That is the number of permutations! In a combination the order of the numbers does not matter, so there is only one combination 123. And that is the same as 132, or 312 or ...
How many sides does a 123-gon have?
In general an n-gon has n sides. Therefore, a 123-gon would have 123 sides.
What number to the seventh power equals 128?
Two.Two.Two.Two.
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