2100
1111 is the only one.
Because any 3 digit number ending in 4, 5 or 6 is composite.
No, 11 is the only palindromic prime with an even number of digits.
There are 90 palindromic numbers between 100 and 1000
2100
1111 is the only one.
Because any 3 digit number ending in 4, 5 or 6 is composite.
No, 11 is the only palindromic prime with an even number of digits.
Since all the numbers in that range start with "11", there is really only one option!
There are 90 palindromic numbers between 100 and 1000
Aside from single digit primes, the first ten palindromic prime numbers are: 11 101 131 151 181 191 313 353 373 383 727
If you think about the digits, you can rewrite them as ABBA, with A being one digit and B being another: A can be 1-9 and B can be 0-9. Since A has to be 1, B can be 0-9, leaving 10 palindromic numbers.
They are called palindromic primes
1100
there are 10 palindromic numbers between 9000 and 10000 9009,9119,9229,9339,9449,9559,9669,9779,9889,9999!!!
1097