aops的 AMC10应该可以 简单可以再试试AMC12

https://artofproblemsolving.com/wiki/index.php/AMC_Problems_and_Solutions

You can find problems and solutions from the math contests run by the American Mathematics Competitions on the following pages:

AMC 8 / AJHSME Problems and Solutions
AMC 10 Problems and Solutions
AMC 12 Problems and Solutions
AHSME Problems and Solutions
AIME Problems and Solutions
USAMO Problems and Solutions
USAJMO Problems and Solutions

【 在 lemongreen 的大作中提到: 】
: 老师建议让孩子做点难题练习联系，网上找了点，孩子说太简单。
: 求数学和物理的资源建议！
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