Global Education หนังสือแบบฝึกหัดคณิตศาตร์ภาอังกฤษโอลิมปิกป.2 Mathematical Olympiad Training Book Level 2
Each Mathematical Olympiad Training Book contains over 250 questions that offer:
critical thinking skills through solving Math Olympiad type questions which are normally trickier and tougher;
greater exposure and experience in solving Maths Olympiad type of problems;
creative methodologies and elegant solutions to maths problems including working backwards solving by assuming replacement method substitution method and so on.