Question

y={y|y € N y is prime number from 1to 20

Answer 1

Answer:

y={2, 3, 5, 7, 11, 13, 17, 19}

Answer 2

Answer:

y= {2,3,5,7,11,13,17,19}

there are the prime numbers between 1 to 20

prime numbers means it contains factors as the same number and the number 1