Question 849538: The sum of the composite numbers between 20 and 30,minus the sum of the prime numbers less than 20.(show all calculations)
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The sum of the composite numbers between 20 and 30,minus the sum of the prime numbers less than 20.(show all calculations)
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composite numbers between 20 and 30:: 21,22,24,25,26,27,28
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sum of those = 173
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prime number < 20: 19,17,13,11,7,5,3
sum of those = 75
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Ans: difference = 173-75 = 98
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Cheers,
Stan H.
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