1.Can you express every odd prime number as the difference of two squares?
4. Some square numbers can be formed by adding 2 prime numbers together.
Eg. 4=2+2 ; 9=7+2 : 16=11+5 and 16=13+3
Investigate whether it is possible to form every square number by adding two primes together.
5.What is Goldbach's Conjecture?
6. Is there a largest prime number? Try to find it or proof that it does not exist.
I don't understand most of the questions. All help will be appreciated. Ty