Variation - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 1979

x is directly proportional to y and inversely proportional to z. If x = 9 when y = 24 and z = 8, what is the value of x when y = 5 and z = 6?

A. \(\frac{5}{6}\)
B. 11
C. 3\(\frac{3}{5}\)
D. 2\(\frac{1}{2}\)
E. 1\(\frac{1}{5}\)

Question 2:

• JAMB 2019

The marks scored by 30 students in a Mathematics test are recorded in the table below:

Scores(Mark)	0	1	2	3	4	5
Noofstudents	4	3	7	8	6	2

What is the total number of marks scored by the children?

A. 82
B. 15
C. 63
D. 75

Question 3:

• 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 4:

• JAMB 2019

If M varies directly as N and inversely as the root of P. Given that M = 3, N = 5 and P = 25. Find the value of P when M = 2 and N = 6.

A. 36
B. 63
C. 47
D. 81

Question 5:

• 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