Question

a two digit prime is still prime if the digit reverse.what is it?​

Answer 1

Answer:

Those primes are: 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 71, 73, 79, 83, 89, and 97. Whittling this list down to pairs whose digits are reversed, we get the possibilities for x and y: 11 and 11, 13 and 31, 17 and 71, 37 and 73, and 79 and 97.