3, 13 and 23 are prime numbers.
3
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.
You may mean: 3 and 5 are prime numbers that add up to the composite number of 8
17
41-- Less than 100-- 42 is the multiple of 7-- 4 + 1 = 5
The prime numbers that are greater than 20 but less than 42 are 23, 29, 31, and 37. To find the average, add up these numbers (23 + 29 + 31 + 37) and divide by the total number of primes (4). The average is 30.
u have to add 1 add 1
It is impossible for three prime numbers less than 30 to add up to 1955. After all, 30+30+30 is only 90.
An even number because every prime number gretaer than 2 is odd.
Prime. It is only divisible by itself and one.
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.)
You could add a negative number. ex. 98 + -100 = -2