ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 166:

• JAMB 1983

Factorize completely 81a4 - 16b4

A. (3a + 2b)(2a - 3b)(9a² + 4b²)
B. (3a - 2b)(2a - 3b)(4a² - 9b²)
C. (3a - 2b)(3a + 2b)(9a² + 4b²)
D. (6a - 2b)(8a - 3b)(4a³ - 9b²)

Question 167:

• JAMB 1984

\(\frac{0.0001432}{1940000}\) = k x 10ⁿ where 1 \(\leq\) k < 10 and n is a whole number. The values K and n are

A. 7.381 qnd -11
B. 2.34 and 10
C. 3.871 and 2
D. 7.831 and -11

Question 168:

• JAMB 1984

p varies directly as the square of q and inversely as r. If p = 36, when q = 36, when q = 3 and r = 4, find p when q = 5 and r = 2

A. 72
B. 100
C. 90
D. 200
E. 125

Question 169:

• JAMB 1984

Factorize 6x2 - 14x - 12

A. 2(x + 3)(3x - 2)
B. 6(x - 2)(x + 1)
C. 2(x - 3)(3x + 2)
D. 6(x + 2)(x - 1)
E. (3x - 4)(2x + 3)

Question 170:

• JAMB 1984

In a racing competition, Musa covered a distance 5x km in the first hour and (x + 10)km in the next hour. He was second to Nzozi who covered a total distance of 118km in the two hours. Which of the following inequalities is correct?

A. -1 < x < x < 0
B. -3 < x < 3
C. 0 \(\leq\) x < 18
D. 15 < x < 18