Top Aptitude Tricks for Competitive Exams 2026 | Master Averages

Struggling with average and age problems in your aptitude tests? In this video, we break down a classic question that appears in almost every major competitive exam: "The average age of a class of 30 students is 12 years. If the teacher's age is included, the average becomes 13 years. What is the teacher's age?" Most people try to do complex multiplication, but I’m going to show you a mental math shortcut that lets you find the answer without even picking up a pen! What you’ll learn: The logic behind shifting averages. Step-by-step breakdown of the "Addition to Group" formula. How to avoid common calculation traps. Perfect for: Students preparing for Matric Enterance, GRE, GMAT, SAT, Banking Exams, and Job Recruitment tests. Don't forget to SUBSCRIBE for more daily aptitude hacks and math shortcuts!