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How many combinations are in a 5 digit number where all digits are distinct and nonzero?
There are 126 different 5 digit combinations. Note that the combination 12345 is the same as the combination 45312.
What is the smallest six digit number using the digits 012345?
012345 or -543210, if negative numbers are permitted.
What is the ten's digit of the smallest number that uses each of the odd digits exactly once?
7? (13579)
What is the difference between the largest five-digit number and the smallest six-digit number?
1 The largest five-digit number is 99999 and the smallest six-digit number is 100000, so the difference is one. If you're just looking for an answer to a homework question, that's all you need. For the brainy: Suppose the answer was greater than one. That would mean that there are one or more numbers between the largest five-digit number and the smallest six-digit number that cannot be written with either five or six digits. Either they would have to be written with four or fewer digits, which would make them smaller than any five-digit number, or with seven or more digits, which would make them larger than any six-digit number. If the answer was less than one, it would mean that it would be possible to have a five digit number that was greater than a six-digit one. So the answer must be one.
What is the smallest 3 digit prime number?
101 is the smallest 3 digit prime number.
