The Thief’s Story — Important Questions

Cooking, Writing his name, Adding numbers

Anil taught the narrator to cook after his first terrible meal, to write his name, and promised to teach him to add numbers and write whole sentences.

By cheating on shopping

The narrator mentions 'I made the tea in the morning and then would take my time buying the day's supplies, usually making a profit of about a rupee a day.'

600 rupees

When the narrator counts the stolen money, he finds '600 rupees in fifties!' which he had taken from under Anil's mattress.

True

The narrator hesitated at the platform and later realized he had forgotten about learning to write whole sentences, which could bring him more than a few hundred rupees in the future.