How many numbers less than 20 can be written as the sum of two prime n – InterviewSolution

1.	How many numbers less than 20 can be written as the sum of two prime numbers?
Answer» -step explanation:So 2 is the only even number less than 20 that cannot be WRITTEN as a sum of 2 PRIMES. Any odd integer that is the sum of two primes must be of the form 2+P where p is an odd prime. Hence, for p = 3, 5, 7, 11, 13, 17 we have 5, 7, 9, 13, 15, 19.

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