QUESTION 1 (25 MARKS)
•• 1-V 11
1.1 Show that a ;;i=-d-
(5)
1.2 A loan of N$10, 000 is to be repaid over 10 years by a level annuity payable
monthly in arrears. The amount of the monthly payment is calculated on the basis of
an interest rate of 1% per month effective. Find the
1.2.1
1.2.2
1.2.3
1.2.4
Monthly repayment.
(4)
Total capital repaid and interest paid in the 1st and last year respectively. (6)
After which monthly repayment the outstanding loan is first
less than N$5, 000.
(5)
For which monthly repayment the capital repaid first exceeds the interest. (5)
QUESTION 2 (25 MARKS)
2.1 Define the nominal rates of interest
(3)
2.2 Derive the compound interest formula from simple interest
(7)
2.3 Deduce the continuous compounding formula from the compounding formula (10)
2.4 Show that a°'1 = lim a,,1= 1/i
(5)
QUESTION 3 (25 MARKS)
= 3.1 Given that o 0.1 find the values of
(12)
3.2 On 10 Jan in each of the years 1964 to 1979 inclusive, an investor deposited £5000 in
a special bank savings account. On 10 Jan 1983, the investor withdrew his savings.
Given that over the entire period the bank used an annual interest rate of 7% for its
special savings accounts, find the sum withdrawn by the investor.
(10)
3.4 Why do banks impose interest
(3)
21Page