SOLUTION: find the composite number between 20 & 50 whose prime factors have a sum of 21

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Question 638972: find the composite number between 20 & 50 whose prime factors have a sum of 21
Found 2 solutions by jim_thompson5910, Edwin McCravy:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
This mainly guess and check, but notice how

38 = 2*19 and how 2+19 = 21

So the answer is 38

Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
21 is the sum of the two primes 2 and 19. so 2×19 or 38 is the number,
since it's between 20 and 50.

Edwin