LAC数学也不错, 应该不会将50%-90%等同于50%+/-40%

2011 America's William Lowell Putnam College Math Competition TOP 10,

1 HARVARD UNIVERSITY
2 CARNEGIE-MELLON UNIVERSITY
3 CALIFORNIA INSTITUTE OF TECHNOLOGY
4 STANFORD UNIVERSITY
5 MASSACHUSETTS INSTITUTE OF TECHNOLOGY
6 HARVEY MUDD COLLEGE
7 UNIVERSITY OF BRITISH COLUMBIA
8 UNIVERSITY OF MICHIGAN, ANN ARBOR
9 UNIVERSITY OF VIRGINIA
10 WILLIAMS COLLEGE

Ivy one school, LAC 2 schools. Of cause, historically, Ivy should be better than LACs.

There were teams from 460 institutions