Question

1) write the following sets in roster form.
A = {x?
x is a prime number which is a
divisor of 90}
B: {x:x is a 3 digit even numbers such that
the sum of digits is 4}​

Answer 1

Answer:

1) 90 ke factor nikalo by prime factorisation method or note kr lo konse prime nunber hai. note- 1 is niether prime nor composite

2) empty set