<p>Just based pure difficulty to qualify for the national exam, which one is easier? i know that USABO requires top 10% of the open exam but im not sure about usnco since it seems like you only have to get into the top 2 of your school in order to qualify which seems by far easier. Thanks guys.</p>
<p>Depends on you , Usabo has more memming.</p>
<p>thanks i think i’ll do usnco since my school has a really good chem ap department. I like the 2 subjects about the same but i think i can do better at chem</p>