Question

Q.1 ‐ Write five pairs of prime numbers less than 20 whoose sum is divisible by 5.​

Answer 1

Answer:

2+3=5

7+3=10

13+2=15

7+13=20

3+17=20

Answer 2

Answer:

pair 1 : 3 + 2 = 5 (divisible by 5)

pair 2 : 3 + 7 = 10 (divisible by 5)

pair 3 : 13 + 2 = 15 (divisible by 5)

pair 4 : 17 + 3 = 20 (divisible by 5)

pair 5 : 19 + 11 = 30 (divisible by 5)