Logic and Reasoning are a mainstay of College Entrance Tests and Maths Olympiads, and the type of question studied in this video is extremely common, namely given premises and a conclusion, is the argument valid or invalid? For more videos on Logic see our playlist 'Logic and Reasoning' https://www.youtube.com/playlist?list=PLlX3COjsHPVC1-RhCIjX3pPxfQHIdlxP3 For more videos on Sets see our playlist 'Sets and Venn Diagrams' https://www.youtube.com/playlist?list=PLlX3COjsHPVDwWwEGInspFy6e5rSanCRX For more videos on Maths Olympiads, see our playlist 'Maths Olympiads' https://www.youtube.com/playlist?list=PLlX3COjsHPVAxSyujoS5eDQNz3tj681y1 For more videos on College Entrance Tests see our playlist 'UPCAT and Other CETs' https://www.youtube.com/playlist?list=PLlX3COjsHPVAfsDQxh84q-qOP2XK027Hv For more videos on JEE Main see our playlist 'JEE Aspirant' https://www.youtube.com/playlist?list=PLlX3COjsHPVAyTDuUPm9jQy6LtI4-KcHg