The following series of numbers might help to summarize the MIT career of MathWorks Professor of Mathematics Gilbert “Gil” Strang ’55, who taught his last class on May 15. 3+2+61=66, or 75% of his life Strang has spent 66 of his 88 years at MIT — as a student, an instructor, and a faculty member. “There were about eight math majors then,” says Strang, a William Barton Rogers Scholar who took just three years to graduate from MIT with a BS, in 1955. “And now there are hundreds.” Strang received…