International Standard Music Number 3 left to right. These weighted digits are added together. The check digit is the integer between 0 and 9 that makes the sum a multiple of 10. For instance, for the item with ISMN beginning 979-0-060-11561: As 85 mod 10 = 5, the check digit is 10 - 5 = 5 and the full number is 979-0-060-11561-5. For another example, Robert Fripp's collection of Guitar Craft scores has the ISMN 979-0-9016791-7-7. Given first 12 digits 979-0-9016791-7, the ISMN algorithm evaluates which implies that the check digit is indeed 7 (because 123+7=130=13x10). International Standard Music Number The International Standard Music
Room number often assigned based on the side of the corridor on which the room is located: one side of the corridor has odd-numbered rooms and the opposite side has even-numbered rooms. However, numbers may also proceed in an ascending manner on one side of the corridor before switching to the opposite side to continue doing so on that side. In four digit room numbers, this digit will be represented by the fourth digit instead of the third. Where a room is subdivided, the rooms which are accessed after entry into the primary room number are denoted by appending a letter suffix