Inverse variation - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 1979

The mean of the numbers 1.2, 1.0, 0.9, 1.4, 0.8, 0.8, 1.2 and 1.1 is

A. 1.5
B. 0.8
C. 1.0
D. 1.02
E. 1.05

Question 2:

• JAMB 2019

If P varies inversely as the square root of q, where p = 3 and q = 16, find the value of q when p = 4.

A. 12
B. 8
C. 9
D. 16

Question 3:

• JAMB 2017

y is inversely proportional to x and y and 6 when x = 7. Find the constant of the variation

A. 47
B. 42
C. 54
D. 46

Question 4:

• 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 5:

• JAMB 1982

A variable y is inversely proportional to x², when y = 10, x = 2. What is y when x = 10?

A. 2
B. 4
C. 100
D. 0.4
E. 0.1