Mathematics 1986 Jamb Past Questions and Answers

Question 16 :

• JAMB 1986

Simplify \(\frac{9^{\frac{1}{3}} \times 27^{-\frac{1}{3}}}{3^{-\frac{1}{6}} \times 3^{\frac{2}{3}}}\)

A. \(\frac{1}{3}\)
B. 1
C. 3
D. 9

Question 17 :

• JAMB 1986

If x varies directly as y³ and x = 2 when y = 1, find x when y = 5

A. 2
B. 10
C. 125
D. 250

Question 18 :

• JAMB 1986

Factorize completely 8a + 125ax3

A. (2a + 5x²)(4 + 26ax)
B. A(2 + 5x)(4 - 10x + 25x²)
C. (2a + 5x)(4 - 10ax + 25x²)
D. A(2 + 5x)(4 + 10ax + 25x²)

Question 19 :

• JAMB 1986

If y = \(\frac{x}{x - 3}\) + \(\frac{x}{x + 4}\) find y when x = -2

A. -\(\frac{3}{5}\)
B. \(\frac{3}{5}\)
C. -\(\frac{7}{5}\)
D. \(\frac{2}{5}\)

Question 20 :

• JAMB 1986

Find all real numbers x which satisfy the inequality \(\frac{1}{3}\)(x + 1) - 1 > \(\frac{1}{5}\)(x + 4)

A. X < 11
B. X < -1
C. X > 6
D. X > 11