Noel has been working on making handmade birthday cards for 11/12 hour. If each card takes 1/6 hour to make, how many whole cards did he make?

Noel has spent 11/12 hours working on making birthday cards.

If each card takes 1/6 hour to make, in 11/12 hours, he made 11/12 / 1/6 = 11/12 * 6/1 = <<11/12*6/1=11*6/12=5.5>>5.5 cards
The number of whole cards he made is 5 cards since he cannot have half a card. Answer: \boxed{5}.