Originally Posted by Bostonian
Originally Posted by Chrys
You have to get a 20ish on AMC8 to take the 10.
That may be the policy at your child's school for students in grades 8 and below, but the Mathematical Association of America, which administers the test, has no such rule AFAIK.

I think if you score high enough on the AMC8 you will be "invited" to take the AMC10. That threshold may be 20. This is the level where MAA thinks you are very strong and wants to see how you do at a higher level.

Bostonian is also right though. Anyone can register for the AMC10 if they want to. No "invitation" is needed.