Jharne De and Ranjana Kumar Solutions for Chapter: Simple Interest and Compound Interest, Exercise 1: Mental Maths

Ramesh borrowed $₹12,000$ from Raman for $2$ years at $12.5\%$ per annum compound interest. Find the amount payable by Ramesh at the end of $2$ years.

After $2$ years, at the rate of $4.8\%$ per annum compounded annually, the amount is $₹1,25,000$. Find the initial amount.

The SI on a sum of money for $3$ years at $12 \frac{1}{2}\%$ per annum is $₹1,500$. What will be the CI on the sum at the same rate for the same period?

Find the CI on $₹2,500$ at $10\%$ per annum compounded annually for $2$ years.

A person borrows a sum of $₹64,000$ from a bank at the rate of $2.5\%$ per annum compounded annually. Find the amount and CI payable after $3$ years.

Sultan lent $₹16,000$ to his friend at $2.5\%$ per annum compounded interest. What amount will Sultan get after $3$ years?

The rate of depreciation of a commodity is indicated by _____. $\left(-r/+r\right)$

The simple interest on a certain sum of money for the first and second years will be the _____. (same / different)