ST. JOHN'S - Undergraduate students across North America sat down on Saturday to write a gruelling six-hour math exam, many of them unlikely to solve a single problem.

The notoriously brutal William Lowell Putnam Mathematical Competition is more of a mathematical sporting event than an academic test. The annual exam attracts thousands of students, most of whom are unlikely to score more than three points out of possible 120.

The 好色tv Press. All rights reserved.