Formula for CI

Q.

Question 89

Find the difference between compound interest and simple interest on Rs. 45000 at 12% per annum for 5 yr.

Q.

Question 85(i)

If principal = Rs. 100000, rate if interest = 10 $\%$ compounded half - yearly.
Find Interest for 6 months.

Q.

Question 79(ii)

Given, the principal = Rs. 40000, rate of interest = 8% per annum compound annually. Find Principal for 2nd year.

Q. Find the difference between the compound interest (compounded annually) and the simple interest on $Rs2000$ for $3$ years at the rate of $8\%$ per annum.

Q. To gain $25\%$ after allowing a discount of $10\%$, the shopkeeper must mark the price of the article which costs him Rs. 360 as:

1. Rs 500
2. Rs 450
3. Rs 460
4. Rs 486

Q. The true discount on $Rs.1760$ due after a certain time at $12$% per annum is $Rs.160$. The time after which it is due is:

1. $6$ months
2. $8$ months
3. $9$ months
4. $10$ months

Q.

Kamala borrowed Rs. 26, 400 from a bank to buy a scooter at a rate of 15% interest p.a. compounded yearly. What amount will she pay at the end of 2 years and 4 months to clear the loan?

1. Rs. 36659.7

2. Rs. 46659.7

3. Rs. 37545

4. Rs. 36660

Q. A sum of money is lent out at compound interest at a certain rate per annum becomes three times of itself in $8$ years.Find in how many years will the money become $27$ times of itself at the same rate of interest per annum.

Q.

Bill noticed that it was easy to find occupants of the “House of Rational Numbers, Q” if they “dressed up” in their decimal form. He wanted to understand if he could locate the occupants of the house on Numerus Linum if they were in their “$\frac{p}{q}$” form. Bill remembered interacting once with the occupant “$\frac{2}{9}$” before. He thought of locating this on the line. Bill knew that this occupant lived between occupants “0” and “1” – both of which had markings on the line. To locate “$\frac{2}{9}$”, Bill first mentally divided the part on Numerus Linum between 0 and 1 with required number of markings – which was “x”. Then he navigated to division number “y” after 0 to reach “$\frac{2}{9}$”.

What is the numerical value of (x+y)?

___

Q.

If you can check out a library book for three weeks, and renew it twice, then how long can you keep it?

1. Nine Weeks

2. Five Weeks

3. Seven Weeks

4. Six Weeks

Q. The CI on a certain sum for $2$ years is Rs. $410$ and SI is Rs. $400$. The rate of interest per annum is:

1. $10\%$
2. $8\%$
3. $5\%$
4. $4\%$

Q. Question 7 (ii)
Maria invested Rs 8, 000 in a business. She would be paid interest at 5% per annum compounded annually. Find:
(ii) The interest for the third year.

Q. Find the compound interest at $5\%$ p.a. for 3 years on that principal which gives simple interset of $Rs.2400$ at the same rate and for the same time.

Q. Write a program that implements a user defined function that accepts Principal Amount, Rate, Time, Number of Times the interest is compounded to calculate and displays compound interest.(Hint: $CI=\left(\right(P\ast (1+R/N){)}^{NT})$

Q.

If you can check out a library book for three weeks, and renew it twice, then how long can you keep it?

1. Nine Weeks

2. Five Weeks

3. Seven Weeks

4. Six Weeks

Q. A person took a loan and purchased a product at a discount of $\$$40. The discount percentage was equal to the rate of interest of the loan. While repaying the money, the interest he had to pay was $\$$80. Find the time taken to repay the loan.

(Assume the interest calcucated for the loan was simple interest.)

1. 6 months
2. 4 years
3. 1 year
4. 2 years

Q. Find the principal if the interest compounded annually at the rate of 10% for two years is Rs 210. (in Rs)

Q. At what rate per cent per annum will a sum of Rs. $7500$ amount to Rs. $8427$ in $1\frac{2}{2}$ years, compounded annually?

1. $8\%$
2. $6\%$
3. $5\%$
4. $4\%$