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Message:: [QUOTE="Numbers, post: 1932557, member: 11668"]They're a consistent interval apart (50,000, in this case); they're just arranged on the sheet in an odd pattern.  The numbering goes by quadrants, and within each quadrant, by columns. So if your sheet starts with 98447777, then the upper left quadrant of the sheet will count up from that number by 50,000 each position: 98447777 9864777798497777 9869777798547777 9874777798597777 98797777 But from there, the numbering will jump down to the lower left quadrant and repeat the pattern; then the upper right quadrant; then the lower right.  So the whole sheet will be: 98447777 98647777 99247777 9944777798497777 98697777 99297777 9949777798547777 98747777 99347777 9954777798597777 98797777 99397777 9959777798847777 99047777 99647777 9984777798897777 99097777 99697777 9989777798947777 99147777 99747777 9994777798997777 99197777 99797777 99997777 On the modern uncut sheets, the "skip" between positions (50,000 for your sheet) varies greatly.  We've seen sheet printings with skips as large as 100,000 (1995 $2 F..B) and as small as 300 (2004A $10 GF..*).  Usually they're fairly nice round numbers like 20,000 or 25,000, but some of them have been odder-looking numbers like 48,000 or 23,000 or even 1,125.[/QUOTE]