Complete guide to Banker's Discount for competitive exams: basic concept of Banker's Discount (simple interest on Amount Due), difference between Banker's Discount (BD) and True Discount (TD), Banker's Gain (BG = BD – TD), formulas for Banker's Discount (BD = Amount × Rate × Time / 100), formulas for Banker's Gain (BG = (Amount × Rate² × Time²) / (100 × (100 + Rate × Time))), relationship between BG, TD and PW (BG = (TD)² / PW), finding Amount Due when BD and TD given, finding Present Worth when BD and BG given, finding Rate Percent when BD and Amount given, finding Time when BD and TD given, problems on bills drawn and discounted, problems on immediate payment discount, finding discount on bills due after certain time, banker's discount vs true discount comparison, and shortcut tricks for SSC, Banking, Railway, UPSC, and other government exams.