Question

1. Find the sum of prime numbers from 1 to 2001.​

Answer 1

Answer:

Below is a simple algorithm for finding the sum of prime numbers: Take the square root of the upper bound (100 in this case) and subtract 1 to find the upper bound of a small set of odd number divisors to identify the prime numbers between 3 and 99 (1 is not a prime number and 2 is the only even prime number).

Answer 2

The odd integers from 1 to 2001 are 1 , 3 , 5 , 1999 , 2001 .

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