Most CAT aspirants memorise A+B+AB/100. Very few understand why it works.In this 7-minute video, we derive the formula from scratch so you never have to memorise it again.Link - https://youtu.be/dndw7isLjQg?si=sOfjGaCuYpmkLShSt.me/twoiim/5472June 27, 2026 790