Jamb Mathematics 1991 Past Questions and Answers

Question 6:

• JAMB 1991

Factory P produces 20,000 bags of cement per day while factory Q produces 15,000 bags per day. If P reduces production by 5% and Q increases production by 5%, determine the effective loss in the number of bags produced per day by the two factories

A. 250
B. 750
C. 1000
D. 1250

Question 7:

• JAMB 1991

Musa borrows N10.00 at 2% per month simple interest and repays N8.00 after 4 months. How much does he still owe

A. N10.80
B. N10.67
C. N2.80
D. N2.67

Question 8:

• JAMB 1991

If 3 gallons of spirit containing 20% water are added to 5 gallons of another spirit containing 15% water, what percentage of the mixture is water?

A. 2\(\frac{4}{5}\)%
B. 16\(\frac{7}{8}\)%
C. 18\(\frac{1}{8}\)%
D. 18\(\frac{7}{8}\)%

Question 9:

• JAMB 1991

What is the product of \(\frac{27}{5^1}\)(3)^-3 and \(\frac{(1)^{-1}}{5}\)?

A. 5
B. 3
C. 1
D. \(\frac{1}{25}\)

Question 10:

• JAMB 1991

Simplify 2log \(\frac{2}{5}\) - log\(\frac{72}{125}\) + log 9

A. 1 - 4 log3
B. -1 + 2 log 3
C. -1 + 5 log2
D. 1 - 2log 2