(2+√2)+(2-√2) = 4 and (2+√2)-(-2+√2) = 4
Write 0 and then concatenate the prime numbers in increasing sequence i.e. 0.2357111317192329... Is this number rational or irrational?
Note: Give your reasoning also...
Is it possible to write down 1,2,3..100 in some order (one after an other), such that the sum of any two adjacent numbers is a prime number?