Jamal Webb added 11 points, seven rebounds and seven assists for the Green and White (13-15, 10-8 Big Sky), which maintained its hold on third place in the conference standings. Shane Benton had 10 points.
Portland State (8-17, 5-12), which had its three-game winning streak snapped, is in danger of being eliminated from the Big Sky tourney, which takes the top seven teams. The Vikings are three wins behind the seventh spot in the conference with three games remaining.
North Dakota swept the season series, also defeating the Vikings 85-76 on Jan. 19.
Former Kentucky guard Ed Davender, the only Wildcat with at least 1,500 points and 400 assists, has died. He was 49.
Guard Naz Mitrou-Long, whose 2015-16 season ended in December due to hip problems, has been granted a hardship waiver for the coming season, Iowa State said.
As the Sooners look to life without superstar Buddy Hield and his sidekicks, it's clear their unseasoned players will need to grow up fast.