ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 131:

• 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 132:

• 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 133:

• JAMB 1981

Suppose x varies inversely as y, y varies directly as the square of t and x = 1, when t = 3. Find x when t = \(\frac{1}{3}\).

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

Question 134:

• JAMB 1981

Suppose x varies inversely as y, y varies directly as the square of t and x = 1, when t = 3. Find x when t = \(\frac{1}{3}\).

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

Question 135:

• JAMB 1981

Find a two-digit number such that three times the tens digit is 2 less than twice the units digit and twice the number is 20 greater than the number obtained by reversing the digits

A. 24
B. 42
C. 74
D. 47
E. 72