Book Recommendation

I am an Indian and a 10th grader and shall start doing Olympiad mathematics as I shall be appearing for RMO next year. I have the following books for preparation:
- An introduction to Diophantine equations (by Titu Andreescu, Dorin Andrica & Ion Cucurezeanu)
- 103 Trigonometry problems (by Titu Andreescu & Zuming Feng)
- Euclidean Geometry in Mathematical Olympiads (by Evan Chen)
- A path to Combinatorics for undergraduates (by Titu Andreescu & Zuming Feng)

How should I start preparing ? In which order? Also, is the first book sufficient for Number theory? What book should I buy for algebra that shall be within my monetary capabilities? Don't suggest me Aops books as I don't have enough money to buy them. I have got these books from my friend.

Note by Anamitra Sengupta
7 months, 2 weeks ago

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First you need to complete Pre-College Mathematics (it is a must for olympiads).

Most Important thing for RMO is to solve previous year papers.

Some good books which I know:

You can Try Coxeter or Challegnig Problems in geometry By Alfred Posamentier for geometry, David Burton for number theory , Zdravko Cvetkovski for inequalities , rest do questions from Brilliant and AoPS.

- 7 months, 2 weeks ago