OAR 177-099-0050
Drawings
(1)
General: Drawings shall take place at such times and upon such intervals as determined by the Director. Drawings shall normally take place at four minute intervals. The last drawing shall take place just prior to the deactivation of the Lottery’s central computer system for the day.(2)
Objective: Each drawing randomly selects twenty numbers from a possible eighty numbers that are the winning numbers. The winning numbers selected at each drawing are generated through the use of a computer-driven random number generator.(3)
Selection of the Keno Multiplier Number: The Lottery will conduct a separate random Keno Multiplier drawing and announce the result prior to each of the regular Keno drawings by displaying the Keno Multiplier number on the Keno monitor immediately prior to each new Keno game drawn and after the previous game pool closes. During each random Keno Multiplier drawing, one number will be selected. The Keno Multiplier numbers available for selection are 1, 2, 3, 5, and 10. The Keno Multiplier number selected at each drawing is generated through the use of a computer-driven random number generator in accordance with the provisions of OAR 177-046-0080 (Drawings).(4)
Selection of the Bulls-Eye Number: The Bulls-Eye numbers available are 1 through 80. For each Keno or Special Keno drawing, the Lottery will randomly select twenty numbers through the use of a computer-driven random number generator in accordance with the provisions of OAR 177-046-0080 (Drawings). The Bulls-Eye number for a drawing will be the twentieth number selected by the random number generator for that drawing. All twenty numbers selected will be randomized for display on the Keno monitors. After the twenty numbers selected are displayed on the monitor, the monitor will then identify which number is the Bulls-Eye number.
Source:
Rule 177-099-0050 — Drawings, https://secure.sos.state.or.us/oard/view.action?ruleNumber=177-099-0050.