The only trick most people are familiar with is the 26k trick.
It isn't clear what kind of trick you want to perform.
yes was that a trick?
You can't anymore, as of 12/3/2009 they have disabled it.
There was, but there isn't now because JaGex fixed it.
No. This is considered scamming. And is a reportable offense.
Zero. Please search this site for the word DOUBLE. You'll find hundreds of similar questions about these trick "coins".
back flip
Trick Daddy goes by Trick Daddy Dollars, and T-Double-D.
Go to Break.com or YouTube.com and search for Matrix Card Trick. The trick is also cool without cards.
a tanner and a shilling
It doesn't matter, Jagex fixed this to prevent players form making easy money.
A trick coin that you buy at a magic shop, I reckon.