Question

Write three pairs of prime numbers less than 20 whose sum is divisible 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

13+7=20, divisible by five

3+17=20, divisible by five

2+13=15, divisible by five

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