the numbers are
1xxx1
2xxx2
3xxx3
4xxx4
5xxx5
6xxx6
Since each of the x's can be any digit, but the first and last must be the same, there are 100 palindromes in each group.
six groups means 600 palindromes.
3 of the groups are even.
So, that makes 300 even palindromes.
How many integer palindromes are between 10,000 and 70,000 and how many of those are even?
1 answer