Question

How many six-digit palindromic numbers (numbers that are the same when the order of their digits is inverted, e.G., 137731) are there?

Answer 1

Answer:

There are six-digit palindromes in base . 6-digit palindrome numbers, so the last 3 digits must be same as the first 3 but in reverse order.......................

Answer 2

Answer:

The number of six-digit palindromes equals the number of three-digit numbers: There are six-digit palindromes in base.