Hi..I am Sushmita from India. My weakest topic is Combinatorics. I get confused when to multiply and when to add the combinations. But I want to learn it badly.I want to be the best at at it. Please help!!

It is nice to meet you! For help on combinatorics problems I frequently reference the Olympiad section of our techniques page. Scroll down to the subheading "Combinatorics" and you will find many posts on essential concepts with worked examples.

Overall though, I think the best way to learn on Brilliant is just to do your best on the problems, lose your fear/shame at being wrong, and enter the solution discussions to learn as you go from the methods of others. Learning well from solutions is a skill and takes some getting used to. In general when I read a solution to a problem I did not understand, I read through it step by step and try to justify to myself why they chose to do it the way they did. If you do this and do not understand a step, please ask. People will be happy to help you and chances are you are not the only one with the question.

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TopNewestHi Sushimita,

It is nice to meet you! For help on combinatorics problems I frequently reference the Olympiad section of our techniques page. Scroll down to the subheading "Combinatorics" and you will find many posts on essential concepts with worked examples.

Overall though, I think the best way to learn on Brilliant is just to do your best on the problems, lose your fear/shame at being wrong, and enter the solution discussions to learn as you go from the methods of others. Learning well from solutions is a skill and takes some getting used to. In general when I read a solution to a problem I did not understand, I read through it step by step and try to justify to myself why they chose to do it the way they did. If you do this and do not understand a step,

please ask. People will be happy to help you and chances are you are not the only one with the question.Log in to reply