A two-digit non-prime palindromic number is a number that reads the same forwards and backwards, has two digits, and is not a Prime number. An example of this is 22, as it meets all the criteria: it is two digits, reads the same in either direction, and is divisible by 1, 2, 11, and 22, making it non-prime. Other examples include 44, 66, and 88.
Yes.
There are more 12-digit palindromic numbers than 11-digit palindromic numbers. This is because the number of possible 12-digit palindromic numbers is greater than the number of possible 11-digit palindromic numbers. In general, the number of palindromic numbers of length n is 9 * 10^((n-1)/2), so for 11-digit palindromic numbers, there are 9 * 10^5 = 900,000 possibilities, while for 12-digit palindromic numbers, there are 9 * 10^6 = 9,000,000 possibilities.
11
11
2 digit number
A nonprime number divided by a nonprime number could be either a prime number or a nonprime number. For example, the nonprime number 64 divided by the nonprime number 32 equals the prime number 2. As an example of the other case, the nonprime number 100 divided by the nonprime number 25 equals the nonprime number 4.
Yes.
There are more 12-digit palindromic numbers than 11-digit palindromic numbers. This is because the number of possible 12-digit palindromic numbers is greater than the number of possible 11-digit palindromic numbers. In general, the number of palindromic numbers of length n is 9 * 10^((n-1)/2), so for 11-digit palindromic numbers, there are 9 * 10^5 = 900,000 possibilities, while for 12-digit palindromic numbers, there are 9 * 10^6 = 9,000,000 possibilities.
It is 77.It is 77.It is 77.It is 77.
11
11
The only 2-didgit palindromic prime is 11.
The only number that fits those conditions is... 55
A palindromic number is the same forwards as backwards. In the case of a two-digit number, that means the two digits are the same: 11, 22, 33, 44, 55, 66, 77, 88, and 99. The only one that is prime is 11, since the others are all multiples of 11.
1 to 1000. Pilandromic 108
No. When adding the smallest 2 digit number (= 10) to the smallest 2 digit number (again, 10) the result is a 2 digit number (10 + 10 = 20). When adding the largest 2 digit number (= 99) to the largest 2 digit number (again, 99) the result is a 3 digit number (99 + 99 = 198). As you can see, you'll either get a 2 or 3 digit number, but never a 4 digit number.
2 digit number