यदि ब्याज 10% वार्षिक दर से वार्षिक रूप से संयोजित होता है, तो दो वर्षों के लिए 2,100 रुपये पर अर्जित चक्रवृद्धि ब्याज कितना होगा?

A person invested Rs. 2,000 in a bank at a rate of 5% per annum for 2 years. What is the compound interest he will get?

What is the compound interest (in ₹) on a sum of ₹18,000 at 20% per annum for 234 years, compounded annually?