Thought I'd post this just for fun... try to draw the last symbol of the puzzle below..

 

And another fun riddle..

I am the center of gravity, hold a capital situation in Vienna, and as I am foremost in every victory, am allowed by all to be invaluable. Though I am invisible, I am clearly seen in the midst of a river. I could name three who are in love with me and have three associates in vice. It is vain that you seek me for I have long been in heaven yet even now lie embalmed in the grave. What am I?

 

an obvious V

 

Two 6's back to back...

 

brilliant, just plain brilliant!!!