permutation and combination

A palindrome is a sequence of digits which reads the same backward or forward. For example, 7447, 1001 are palindromes, but 7455, 1201 are not palindromes. How many 8 digit prime palindromes are there?

2Comments
vishnu @vishnu1475
9 Nov 2017 11:16 am

9000

Ashish Kumar Goyal @dashish
17 Nov 2017 05:15 pm

asking for prime pallindromes!