7 x 13
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.)
Yes as for example 2+5 = 7
5 + 7 + 11 = 23
The number multiplied by 1.25
Positive numbers always result in positive numbers when added, divided, or multiplied by another positive number.
The prime number less than 10 that, when added to either 10 or 20, results in a prime number is 3. When you add 10 to 3, you get 13, which is a prime number. Similarly, when you add 20 to 3, you get 23, which is also a prime number.
2 and 3 2 and 5 2 and 11
The first two prime numbers add up to another prime number.
27
It is not possible to multiply two prime numbers and get 90. You can add 43 and 47.
When you add a prime number to itself, the result is always an even number greater than 2. For example, if you take the prime number 3 and add it to itself, you get 6, which is composite. Since the only even prime number is 2, adding any prime number greater than 2 to itself will always yield a composite number.
if you mean what three prime numbers add up to a prime number then the answer is : 5 + 7 + 11 = 23