Jamb Mathematics Past Questions and Answers

Question 661:

• JAMB 1981

What is the size of an exterior angle of a regular pentagon?

A. 36^o
B. 60^o
C. 72^o
D. 120^o
E. 360^o

Question 662:

• JAMB 1981

The sum of the root of a quadratic equation is \(\frac{5}{2}\) and the product of its root is 4. The quadratic equation is

A. X + 8x² - 5 = 0
B. 2x² - 5x + 8 = 0
C. 2x² - 8x + 5 = 0
D. X² + 8x - 5 = 0

Question 663:

• JAMB 1981

Solve the given equation \((\log_{3} x)^{2} - 6(\log_{3} x) + 9 = 0\)

A. 27
B. 9
C. \(\frac{1}{27}\)
D. 18
E. 81

Question 664:

• JAMB 1981

What is the length of an arc of a circle that substends 2\(\frac{1}{2}\) radians at the centre when the raduis of the circle = \(\frac{k}{k + 1}\) + \(\frac{k + 1}{k}\) then

A. P < 0
B. P\(\geq\) 0
C. P \(\leq\) 0
D. P < 1
E. P > 0

Question 665:

• JAMB 1981

In the figure, the chords XY and ZW are produced to meet at T such that YT = WT, ZYW = 40o and YTW = 30o. What is YXW?

A. 50^o
B. 75^o
C. 35^o
D. 115^o
E. 30^o