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Q: What is the sum of twin prime numbers from 20 to 50?

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-20

It is 75.

3 + 17 = 20

They are: 2+7+11 = 20

17 and 3 are two prime numbers whose sum is 20. Their product is 51.

3 and 17

600 * * * * * It is, in fact, 639

It is 1.

17

(2,3) and (2,5) are the two pairs such that the sum of their elements is a prime number.

The sum is: 23+29+31+37 = 120

23+29 = 52

17

The largest prime less than 20 is 19. The largest prime over 60 is 61. The sum of these two numbers is 80.

The prime numbers between 4 and 20 are 5, 7, 11, 13, 17 and 19. Their sum is 72.

There is only one even prime number: 2. So, representing 20 as a sum of even prime numbers would be 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2.

There are infinitely many prime numbers, and also infinitely many twin primes so there is no answer to the question.

2 + 3 = 5

They are: 3+5+11 = 19

There is only one prime number and it is '2' You cannot have any other even prime number

13 + 7 1 + 193 + 17

11 + 13 + 17 +19 = 60

The answer is 52.

38

Prime numbers >20 and <30 are 23 and 29. Total value 52.