Jamb Mathematics 1980 Past Questions and Answers

Question 36:

• JAMB 1980

The expression x3 - 4x2 + cx + d is such that x + 1 is its factor, and its value is 1 when x is -2. Find c and d.

A. C = 4 and d = -9
B. C = -4 and d = 9
C. C = -20 and d = -15
D. C = 20 and d = -15
E. C = -20 and d = 15

Question 37:

• JAMB 1980

If a function is defined by f(x + 1) = 3x2 - x + 4, Find f(0).

A. 4
B. 6
C. 9
D. 8
E. 2

Question 38:

• JAMB 1980

A cylindrical motor of height 12cm has uniform thickness of 2cm. If the diameter of its outer cross section is 10cm, Find the volume of the constituent material. (take \(\pi\) = \(\frac{22}{7}\)

A. \(\frac{6600}{7}\)cm³
B. 270cm³
C. 660cm³
D. \(\frac{4224}{7}\)cm³
E. \(\frac{1980}{7}\)cm³

Question 39:

• JAMB 1980

If x varies inversely as y, and y varies directly as the square root of z, and z varies directly \(\frac{1}{w^2}\) write down in words how x varies with w

A. X varies inversely as w²
B. X varies directly as w²
C. X varies directly as w
D. X varies inversely as w
E. X varies directly as square root of w

Question 40:

• JAMB 1980

Write the decimal number 39 to base 2

A. 10011 base 2
B. 110111 base 2
C. 111001 base 2
D. 100101 base 2
E. 19.5 base 2