What is the sum of the prime numbers from the given numbers? 1,2,3,4,5 *
Answers
Answer:
11 is the correct answer
Answer:
Prime numbers are the positive integers having only two factors, 1 and the integer itself. For example, factors of 6 are 1,2,3 and 6, which are four factors in total. But factors of 7 are only 1 and 7, totally two. Hence, 7 is a prime number but 6 is not, instead it is a composite number. But always remember that 1 is neither prime nor composite.
We can also say that the prime numbers are the numbers, which are only divisible by 1 or the number itself. Another way of defining it is a positive number or integer, which is not a product of any other two positive integers. There is no defined formula to find if a number is prime or not (except to a certain range), apart from finding its factors.
The first ten primes are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.
Note: It should be noted that 1 is a non-prime number.