Jamb Mathematics 1983 Past Questions and Answers

Question 26:

• JAMB 1983

If a rod of length 250cm is measured as 255cm long in error, what is the percentage error in the measurement?

A. 55
B. 10
C. 5
D. 4
E. 2

Question 27:

• JAMB 1983

If \((\frac{2}{3})^{m} (\frac{3}{4})^{n} = \frac{256}{729}\), find the values of m and n.

A. M = 4, n = 2
B. M = -4, n = -2
C. M = -4, n =2
D. M = 4, n = -2
E. M = -2, n = 4

Question 28:

• JAMB 1983

Without using tables find the numerical value of log₇49 + log7_{(\(\frac{1}{7}\))}

A. 1
B. 2
C. 3
D. 7
E. 9

Question 29:

• 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 30:

• JAMB 1983

One interior angle of a convex hexagon is 170^o and each of the remaining interior angles is equal to x^o. Find x

A. 120^o
B. 110^o
C. 105^o
D. 102^o
E. 100^o