4 d.....where Reimann found two lines..
100 is the 1st number with 3 digits........and the 1st number after all of the double digit numbers......have ended................99 to 100......1/9 + 1/10......a two and a 3........1/9 is two numbers...........1/10 is 3 numbers.....when combining them all.................9 + 9 = 18....like 180 degrees............pi in the unit circle.....e starts with a 2, pi starts with a 3....like the beg of all primes....2, and 3........a square root of 13 is the hyp......which starts.....3.60.....like full circle..