Miss Connor asks her class to guess her mystery number she tells him this number has two digits is a prime less than 20 and a factor of 34 what is the number and the mystery number missed Connor has in mind

You are to follow the clues. Since is is 2 digits and is prime, go through the prime numbers between 10 and 20. They are 11, 13, 17, and 19. Then you find the factors of 34 which are 1*34 2x17. That leaves only 1 possible answer: 17