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The numbers 1, 2 or 3 are such numbers.

Q: What number cant you add two prime numbers to get it?

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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

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

You can get another prime (only if one of the numbers added is 2), for example, 101 + 2 = 103. If you add together two odd prime numbers, you will get an even number, which will not be a prime number. (An even number is a number that is divisible by 2; if such a number is greater than 2, it is not a prime number.)

No, they do not. If one of the prime numbers is 2, you will have an odd number.

No, as all prime numbers are odd, excluding 2, and when you add two odd numbers you get an even number. This even number can't be a prime number as it will be divisible by 2. 101 and 31 are both prime, but 101+31 is 132.

Related questions

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

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

You can get another prime (only if one of the numbers added is 2), for example, 101 + 2 = 103. If you add together two odd prime numbers, you will get an even number, which will not be a prime number. (An even number is a number that is divisible by 2; if such a number is greater than 2, it is not a prime number.)

No, they do not. If one of the prime numbers is 2, you will have an odd number.

No, as all prime numbers are odd, excluding 2, and when you add two odd numbers you get an even number. This even number can't be a prime number as it will be divisible by 2. 101 and 31 are both prime, but 101+31 is 132.

Two is the only even prime number. When you add an odd number to another odd number, you get an even number. When you add an even number to an odd number, you get an odd number. 91 is an odd number, therefore the answer is 2 and 89.

You can not add two positive prime numbers and get zero.

composite

The sum of two prime numbers will be composite unless one of the prime numbers is 2.

Just go to a table of prime numbers, find the prime numbers, and add them.Just go to a table of prime numbers, find the prime numbers, and add them.Just go to a table of prime numbers, find the prime numbers, and add them.Just go to a table of prime numbers, find the prime numbers, and add them.

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.

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