391
37 + 3
17, 23.
3 + 37 = 4011 + 29 = 4017 + 23 = 40
The only way for three prime numbers to have a sum of 42 is if one of the prime numbers is 2, as 2 is the only even prime number. The other two prime numbers must add up to 40, which can only be achieved by 3 and 37. Therefore, the three prime numbers that have a sum of 42 are 2, 3, and 37.
In order to find three different prime numbers that sum up to 40, we need to identify the possible combinations. The only prime number that is even is 2, so one of the prime numbers must be 2. The other two prime numbers that add up to 38 can be 19 and 17. Therefore, the sum of the three different prime numbers that add up to 40 is 2 + 19 + 17 = 38.
120
To find the sum of all prime numbers between 20 and 40, we first list out the prime numbers in that range: 23, 29, 31, 37. Then, we simply add them together: 23 + 29 + 31 + 37 = 120. Therefore, the sum of all prime numbers between 20 and 40 is 120.
Oh, isn't that a happy little question! Let's see, the prime numbers between 30 and 40 are 31, 37. So, if we add them together, we get 68. Just remember, there are no mistakes, only happy accidents in math and painting!
23 times 5
68
The prime numbers between 40 and 50 are 41, 43, 47. So their sum is 131.