The sum of the first seven prime numbers divided by two is

Which of the following is equal to the sum of the five smallest prime numbers?

The sum of four consecutive integers is 210. Which one of these four integers is prime?

If is a prime number, what could also be prime?

If is a prime number, how many factors does have?

How many integers between 2 and 20, even only, can be the sum of two different prime numbers?

Define a series of consecutive prime numbers to be a series of numbers, each prime, in which there are no other prime numbers between them. These are not necessarily consecutive numbers themselves. For example, the numbers 5,7 and 11 are consecutive prime numbers, although they are not consecutive numbers.

If is the first number in a series of prime numbers, which of the following could not be the value of the last number in the series?