Yes 2011
Yes in 2006 and 1980
Michigan State is the number 2 seed.
Since the 64 team structure, Virginia made it to the final 4 in 1984 as a number 7 seed.
Yes, quite often. The most recent was LSU in 2006. Arizona won the title as a #4 seed in 1997.
George Mason 2006 LSU 1986
There have been three times in NCAA Men's Basketball history that no #1 seed has been in the Final Four. The only three years were 1980, 2006, and 2011 with the following teams included in their separate final fours: 1980: Louisville (#2 seed), Iowa (#5 seed), Purdue (#6 seed), and UCLA (#8 seed) 2006: UCLA (#2 seed), Florida (#3 seed), LSU (#4 seed), and George Mason (#11 seed) 2011: Butler (#8 seed), UConn (#3 seed), VCU (#11 seed), and Kentucky (#4 seed)
2011 is the first time
yes
11
This has never happened. In 2006 and 1980 there were no number 1 seeds, but both years there was one number 2 seed remaining. 2011 was the first year that there was no number 1 or number 2 seeds that made the final four.
A 16 seed has never defeated a 1 seed, which is their first opponent of the round of 64
From 1979 (when seeds were first used) through 2013, the NCAA men's basketball tournament Final Fours that have had at least one #1 seed is 91.4%. Only three times has the Final Four notincluded at least one #1 seed: 1980, 2006 and 2011. The titles in those years were won by a #2 seed, #3 seed and #3 seed respectively.For the record, there has been only one year when all four #1 seeds made it to the Final Four. This was in 2008.