Shoko

All the 2 digit primes are 11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,91,97 So the ones with a ones digit of one would be 11, 31, 41, 61, 71, 91 that is 6 numbers. I'm so late

Actually my first answer was incorrect! 91 is not a prime number, sorry. So the answer to the question would be 11, 31, 41, 61, 71 which is 5