Question

what is the sum of the prime numbers from 1 to 20​

Answer 1

From 1 - 20 there are Prime numbers , they are :

2

3

5

7

9

11

13

17

19

So , 2 + 3 + 5 + 7 + 9+ 11+ 13 + 15 + 17 +19=?

Sum of prime numbers between 1-20 = 77

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