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Earn +20 ptsQ: How many 4 digit combinations from abcde and can repeat letters?
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How many three digit number combinations are there if you can not repeat a number?
there are 10 possibilities for the first spot, 9 for the second, 8 for the third 10x9x8=720 combinations
What are all numeric 4 digit combinations?
There are a lot of them, so I'm sure you don't want us to list them all. If you want 0-9, and are happy with repeat digits, then it's 10*10*10*10 = 10000 combinations. If it's 1-9 and are happy with repeat digits, then it's 9*9*9*9 = 6561 combinations. 0-9 without repeat digits is 10*9*8*7 = 5040 combinations 1-9 without repeat digits is 9*8*7*6= 3024 combinations
How many 6 digit combinations from a 49 digit universe will contain a particular 3 digit combination?
There are 15180 combinations.
How many 3 single digit combinations add up to 11 and what are they?
14
Are there more 10-digit or 11-digit palindromic numbers?
-1
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