The square root of 13.....3.60555..........full circle and 3 fives.........the golden ratio......AND 15.....like 1.5..like 3/2...........like the 1st 5 non primes and/or the 1st primes are the minimum to connect single digits to double digits......1/2.........single to double............1 to 2...........

The square root of 13.........can be written.....13 ^ 1/2..................or 13 raised to the 0.5 power.......13 + 5 = 18....................1828 in e..........double the rate..................2/8ths or 1/4 is double the percentage of 1/8...............1/8 = 0.125........12.5 percent............1/4...........2/8.......the same number....is 0.25........25%....twice the percentage.....- 2, 0..............................symmetry.......Emmy N.....13 + 12 = 25.........................25 is all over....................


13^0.5 = 3.60555127