i dont think 5 is a digit of 0 and speaking math 0 isn't really a number it only exists in in another number like 10 without the 0 10 would be 1 and like 100 with out the 0 you have 1 again so there you have it.
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The smallest 5-digit number is 10000. To get the smallest 5-digit number, we put a 1 in the first column (since we can't start with a 0 or else we'd get a 4 digit number!), then put a 0 in every other column.
0 is a digit
To find if a number is divisible by 5, the digit in the ones place has to be 0 or 5.
Everything that has 0 as its digit can be divided by both 2, and 5 as well as many more. Therefore it cannot be a prime number.
The smallest 5-digit number is 10000. To get the smallest 5-digit number, we put a 1 in the first column (since we can't start with a 0 or else we'd get a 4 digit number!), then put a 0 in every other column.