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Earn +20 ptsQ: What is the sum of all prime numbers from 1 to 20?
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What is the sum of all prime numbers between 20 and 30?
23+29 = 52
What is the sum of twin prime numbers from 20 to 50?
148
What is the sum of the odd prime numbers from 1-20?
It is 75.
What is the product of two prime numbers whose sum is twenty?
17 and 3 are two prime numbers whose sum is 20. Their product is 51.
What is the sum of all prime numbers more than 20 but less than 30?
They are: 23+29 = 52
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