There was a math Olympiad contest on facebook by Silverzone. I participated and was declared winner. There are various books published by them. Purchased few books online and doing more practice with the help of those books. It enhances our knowledge and help to prepare for competitive exams. Whenever there is a free time after academic studies, it is better to solve question from these books. Though questions are difficult, but can be solved with the help of parents, teachers and elders.