Numbers are where small misunderstandings become expensive ones. In Indian English, large numbers are counted in lakhs and crores, written with commas in a different pattern (1,00,000 for one lakh; 1,00,00,000 for one crore), and spoken quickly: "two point five lakh", "one and a half crore", "fifty-five K". Phone numbers and codes use "double" and "triple". What you will learn: • The Indian number system • Quick conversions • Numbers in speech • Phone numbers and codes • Teens and tens, and other risks • Confirming numbers safely • Practice: decode the number • Listening strategies • Self-check questions to test your ear Level: B1–B2. Self-study: listen, then take the quizzes. Audio voiced with AI from an original script by Dr. Rashmi R Nair.