Question

Write 5 pairs of prime numbers less than 20 whose sum is divisble by 5

Answer 1

Answer:

Five pairs of Prime Numbers less than 20 whose sum is divisible by 5 are (2,3), (3,7), (2,13), (5,5), (3,17), (7,13) According to the Divisibility Rule of 5, any number ending with 0 or 5 is divisible by 5.

Answer 2

Answer:

2,7 (Sum is 10)

1,3 (Sum is 5)

5,5 (Sum is 10)

13,7 (Sum is 20)

17,3 (Sum is 20)