NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 236:

• JAMB 1984

If the price of oranges was raised by \(\frac{1}{2}\)k per orange. The number of oranges a customer can buy for N2.40 will be less by 16. What is the present price of an orange?

A. 2\(\frac{1}{2}\)
B. \(\frac{2}{15}\)
C. 5\(\frac{1}{3}\)
D. 20

Question 237:

• JAMB 1984

A man invested a total of N50000 in two companies. If these companies pay dividends of 6% and 8% respectively, how much did he invest at 8% if the total yield is N3700?

A. N15 000
B. N29 600
C. N27 800
D. N21 400
E. N35 000

Question 238:

• JAMB 1984

Find, without using logarithm tables, the value of \(\frac{log_3 27 - log_{\frac{1}{4}} 64}{log_3 \frac{1}{81}}\)

A. \(\frac{-3}{9}\)
B. \(\frac{-3}{2}\)
C. \(\frac{6}{11}\)
D. \(\frac{43}{78}\)

Question 239:

• JAMB 1984

A trader in country where their currency 'MONI'(M) is in base five bought 103₅ oranges at M14₅ each. If he sold the oranges at M24₅ each, what will be his gain?

A. 103₅
B. 1030₅
C. 102₅
D. 2002₅
E. 3032₅

Question 240:

• JAMB 1984

Rationalize \(\frac{5\sqrt{7} - 7\sqrt{5}}{\sqrt{7} - \sqrt{5}}\)

A. -2 \sqrt{35}\)
B. 4\sqrt{7}\) - 6\(\sqrt{5}\)
C. -\(\sqrt{35}\)
D. 4\sqrt{7}\) - 8\(\sqrt{5}\)
E. \(\sqrt{35}\)