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Q: What prime numbers add up to 20?

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if you mean what three prime numbers add up to a prime number then the answer is : 5 + 7 + 11 = 23

How about: 191+5 = 196 which are both prime numbers

There are no prime numbers greater than 10 that add up to 29. Since all prime numbers greater than 2 are odd numbers, no two prime numbers greater than 2 can have an even number for their sum.

The only way two prime numbers can add up to an odd number is if one of them is 2. Since 63 isn't prime, this pair doesn't exist.

When you add two or more prime numbers you will only end up with a whole number and not a decimal number.

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They are 3+17 = 20

83, 3,and 2 are prime numbers which add up to 88.

53 and 3 are two prime numbers that add up to 56

137 and 11 are two prime numbers that add up to 148.

if you mean what three prime numbers add up to a prime number then the answer is : 5 + 7 + 11 = 23

No two prime numbers can add to 119.

Not necessarily. For example 15 and 16 are composite numbers. They add to 31, which is a prime number. Similarly, the composite numbers 20 and 21 add up to 41, which is a prime number.

23 and 19 are both prime numbers and they add up to 42.

How about: 191+5 = 196 which are both prime numbers

2 2 2 2 3 3 3 3

2 numbers that add up to 8

The given numbers of 15 and 35 are not prime numbers but they add up to 50

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