Question

Which pair is made up of prime numbers 11 & 33 , 42 & 56 , 37 & 67, 57 & 97

Answer 1

37 & 67

Explanation:

11 & 33

• 11 - 1, 11

• 11 is prime

• 33 - 1, 3, 11, 33

• 33 is composite number

• 11 & 33 is incorrect

42 & 56

• 42 - 1, 2, 3, 6, 7, 14, 21, 42
• 56 - 1, 2, 4, 7, 8, 14, 28, 56
• Both 42 and 56 are composite numbers
• 42 & 56 is incorrect

37 & 67

• 37 - 1, 37
• 67 - 1, 67
• Both 37 and 67 are prime numbers
• 37 & 56 is correct

57 & 97

• 57 - 1, 3, 19, 57
• 97 - 1, 97
• 57 is a composite number, 97 is a prime number
• 57 & 97 is incorrect