It is recommended that American Mathematical Contest AMC, American Regional Mathematical Contest ARML, Harvard Massachusetts Mathematical Contest HMMT, California Berkeley Mathematical Contest BMT, Stanford Mathematical Contest SMT, American Genius Search Program USAMTS, Princeton Mathematical Contest PUMAC, Massachusetts Girl Award Contest MPFG, some of which are limited to American students, and some such as AMC and ARML can also participate in China.

AMC is actually a middle school mathematics league in the United States, but AMC8 also has many primary school students signing up. AMC has a strong taste of mathematics, and the expressions of topics are basically mathematical languages. American "Major League" pays more attention to the application of mathematics in life scenes, and the span is also relatively large, from grade three to grade three 12. Another feature of it is that the whole competition is divided into three stages, and each stage has its own characteristics.

The form of kangaroo math contest:

In the form of the topic, the kangaroo math competition is close to the "big league" in the United States, and it also emphasizes fun, vividness and closeness to life, thus stimulating students' interest and self-confidence. The age span is larger than that of "Major League", covering all primary and secondary schools 12 grades. Every two grades test the same set of questions, and * * * is divided into six grade groups.