Simple interest - Jamb Mathematics Past Questions and Answers

Question 11:

• JAMB 1985

a sum of money was invested at 8% per annum simple interest. If after 4 years the money amounts to N330.00. Find the amount originally invested

A. N180.00
B. N165.00
C. N150.00
D. N250.00
E. N200.00

Question 12:

• JAMB 1986

Udoh deposited N150.00 in the bank. At the end of 5 years the simple interest on the principal was N55.00. At what rate per annum was the interest paid?

A. 11%
B. 7\(\frac{1}{3}\)%
C. 5
D. 3\(\frac{1}{2}\)%

Question 13:

• JAMB 1987

A man invests a sum of money at 4% per annum simple invest. After 3 years, the principal amounts to N7,000.00. Find the sum invested

A. N7,840
B. N6,250.00
C. N616.00
D. N5,833.33

Question 14:

• JAMB 1988

The thickness of an 800 pages of book is 18mm. Calculate the thickness of one leaf of the book giving your answer in meters and in standard form

A. 2.25 x 10^-4m
B. 50 x 10^-4m
C. 2.25 x 10^-5m
D. 4.50 x 10^-5m

Question 15:

• JAMB 1989

Oke deposited N800.00 in the bank at the rate of 12\(\frac{1}{2}\)% simple interest. After some time the total amount was one and half times the principal. For how many years was the money left in the bank?

A. 2\(\frac{2}{3}\)
B. 4
C. 5\(\frac{1}{3}\)
D. 8