NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 181:

• JAMB 1980

When a dealer sells a bicycle for N81 he makes a profit of 80%. What did he pay for the bicycle?

A. N73
B. N74.52
C. N75
D. N87.48
E. N75.52

Question 182:

• JAMB 1980

A man and his wife went to buy an article costing N400. The woman had 10% of the cost and the man 40% of the remainder. How much did they have altogether?

A. N216
B. N200
C. N184
D. N144
E. N100

Question 183:

• JAMB 1980

Simplify \(\frac{log_{10}8}{log_{10}4}\)

A. Log10²
B. Log10⁴
C. \(\frac{3}{2}\)
D. 2
E. None of the above

Question 184:

• JAMB 1980

Find the product of (2\(\sqrt{y - 3y}\)) and (3y = 2y)

A. 4y = y²
B. 4y + 9y²
C. 4y - 9y²
D. -4y - 9y²
E. 2y + y²

Question 185:

• JAMB 1980

(\(\frac{x^a}{x^b}\))^{a + b} by (\(\frac{x^{a + b}}{x^{a - b}}\))^{\(\frac{a^2}{b}\)}

A. X^-a2
B. X^b2
C. X^{a2 - b2}
D. \(\frac{1}{x^{a2 + b2}}\)
E. X^{b2 - a2}