How can I learn for International Maths Olympiad for class 9

If U urge to learn then first try to complete your Maths NCERT 9^th class problems and examples.

Then move to 10^th class NCERT books and pratice as well many questions U can.

Find apprropriate maths aptitude questions and answers and do as well by proper planning day by day.

@ ananya 
u can join for askiitians foundation olympiad programme for that , they are awesome at their level of concept clearing . 
and also , there are a book avaliable of mtg publication for olympiad , do follow that , that is the best for olympiad prep . 
and also dnt forget to look at the last 6 year paper that is avaliable on askiitian probbaly , if not go to NSO website for that . 
in olympiad the main thing is time , u ned to manage that and if u are clear with ncert then u can solve 60 percent of ques easily . 

ALL THE BEST ..

First, be prepared with the NCERT textbook. Then go for RS aggarwal and then for RD Sharma. After completing RD Sharma, you can solve most of the questions. If you still want to do more questions, you can refer other books or solve online question papers too.

Refer Study material provided by IMO......

Or just search IMO previous years paper from internet.

Hope it helps you..

You just need to read ncert books till class 9 that is all no extra preparation is required. Also you require just  basic aptitude skills

 

All the best........!!!!!!!!