Question

Express 20 as sum of odd primes

Answer 1

Answer:

3+17=20...(3,17 are primes)

7+13=20..(7,13 are primes).

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Answer 2

Answer:

odd prime no.s below 20 are: 2,3,5,7,11,13,17,19

hence, possible solutions are:

3+17=20

7+13=20

7+11+2=20

5+13+2=20

these are the only possible solutions.