How many base 10 numbers have five digits? How many five digit numbers have no two consecutive digits equal? How many have at least one pair of consecutive digits equal?
Added by Christina E.
Step 1
A five-digit number ranges from 10000 to 99999. The smallest five-digit number is 10000, and the largest is 99999. To find the total number of five-digit numbers, calculate the difference between the largest and smallest five-digit numbers and add 1 (since both Show more…
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