Singapore
Lucky Singapore Sweep ticket number
Three 7-digit numbers built from your own chart — your favourable digits weighted in, the ones your chart works against removed. These are numbers to look for at the vendor, because the ticket already carries its number.
This is a ticket game, not a pick game
Singapore Sweep tickets are pre-printed with a seven-digit number, so you are choosing from what the outlet already has rather than filling in a slip. A number here is one to look for, and if it is not on the shelf the closest match is the honest fallback.
The odds follow from that directly. There are ten million 7-digit numbers, so a given ticket taking first prize is 1 in ten million. Most prizes on these games come from matching only the last two or three digits, which is where nearly all realised winnings sit.