ipv6 addresses...

when i see an ipv6 address, i see groups of four digits separated by colons... each of those four digits in hex will ultimately become 2 numbers separated by a dot in decimal... but first i see them as 2 pair, ie. 2001: is 20 and 01... each number in each  of those pairs are place holders... the left most number in each pair is the 16's place holder while the number to the right of it is the units place holder... so 20 = 16x2 + 0 =32 and 01 = 16x0 +1 =1 or 32.1... of course, if a leading zero is missing, there is no 16's place holder, just a units place holder.

the left number is the 16's place holder and will be multiplied by 16, and it's number to the right is expressed in units...

so :1111: is 11 and 11 or 16x1 + 1 =17 and 16x1 + 1 = 17 and finally 17.17

so...

:0db8: = 0d and b8 = 16x0+13 = 13 and 16x11+8=184 or 13.184

now here's a bar bet winner...

what is the hex equivalent of decimal 20?

20/16 is 1 remainder 4 or 1  4 or 14...

try it with a hex/decimal converter...

you know i'm right but you'll have to prove it for yourself... won't you?