Alcumus

Alcumus is an AOPS resource and is very good for Mathcounts practice. There are multiple levels of questions

https://artofproblemsolving.com/alcumus

To use Alcumus, you need an AOPS account . If you don't have an AOPS account please register an account by using this link https://artofproblemsolving.com/user/register.php

MATHCOUNTS Trainer

MATHCOUNTS trainer is a very good resource which can be used once you pick up some skills using Alcumus. MATHCOUNTS trainer will let you advance to to new levels once you complete a specific level.

https://artofproblemsolving.com/mathcounts_trainer

To use MATCHCOUNTS Trainer, you need an AOPS account. If you don't have an AOPS account please register an account by using this link

https://artofproblemsolving.com/user/register.php

AOPS FTW

AOPS For the Win is a good place to practice MATHCOUNTS countdown round. You can do this without a login as a guest but your scores will not be kept. If you want to keep the score, you will need an AOPS login. To play as a guest, please go to the following link, accept the terms and start playing.

https://artofproblemsolving.com/ftw/tos.php

MATHCOUNTS Oplet

Oplet is one of the best resources for MATHCOUNTS practice. Once you are subscribed to Oplet ( $$) , you can create various levels of questions and it will be available as PDF file.

login to OPLET using this link https://www.mathcounts.org/resources/oplet

Once you are in the Oplet database, choose options based on your need. First it is better to start with lowest level problems and also try to select different topics so that we can understand which areas you are strong and identify areas you need more help. Usually you can start at level 1 and go up as you get comfortable. Questions from OPLET can also be categorized into various topics ( algebra, geometry, number theory, counting and probability, pre algebra etc )