Question

How many pairs of prime number are there which can be used to express 20 as the sum of 2 Prime number

Answer 1

13+7=20

so 13=2+2+2+2+2+3(3 pairs)

and 7=2+5(1 pair)

therefore = 3 pairs + 1 pair

= 4 pairs

Answer:4 pairs

Plz see that it is correct or not.....Hope it helps.....