Indeed. The most extreme I've encountered is the Ciphering Time Trials, where you have 100 problems and 60 minutes. The AIME has 15 problems and 3 hours, but

Indeed. The most extreme I've encountered is the Ciphering Time Trials, where you have 100 problems and 60 minutes. The AIME has 15 problems and 3 hours, but each problem is complex, usually involving several layers of "ok, this is really that"; my friends and I learned to check our work carefully and repeatedly, and even then we usually made several mistakes. For the curious, here's a sample: https://artofproblemsolving.com/wiki/index.php/2017_AIME_I_Problems https://artofproblemsolving.com/wiki/index.php/2017_AIME_I_P...