How Many Four Digit Palindromic Numbers Are There?


There are ninety four digit palindromic numbers in existence. Interestingly enough, this is the same number of three digit palindromic numbers that exist, as the second digit is the same as the third digit in a four digit palindromic number.
Q&A Related to "How Many Four Digit Palindromic Numbers Are..."
The same as the number of two-digit numbers, since the last two digits. must the same as the first two, only reversed. So I'll say there are 100 four-digit palindromes.
To me this looks s simpler than it seems. Being that the number is four digits long, AND a palindrome, the first and last numbers must be the same. Additionally, the second and third
A number is not digits. You could ask how many digits are needed to represent a certain number in base ten, but the question "How many digits is this number?" does not make
Among the 900 5 digit palindromes, 93 are prime. Among the
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