`, 19 February 2007 (UTC)  :I too prefer the 1-2-5-10 set up.  I don't know whether it's ``optimal``: if you had a ¥7000 note as well you'll make another saving.  The Cook Islands have a $3 note.  There's something to be said for 1-3-10 over 1-5-10.  What I find confusing, though, are quarters.  Of course, this all only applies to decimal currency, 1-2-5-10 is no good if you're dealing with 12 pennies to the shilling. p 08:34`