Variation - Jamb Mathematics Past Questions and Answers

Question 41:

• JAMB 2009

W is directly proportional to U. If W = 5 when U = 3, find when W = 2/7

A. ⁶/₃₅
B. ¹⁰/₂₁
C. ²¹/₁₀
D. ³⁵/₆

Question 42:

• JAMB 2010

If y varies directly as the square root of x and y = 3 when x = 16. Calculate y when x = 64

A. 12
B. 6
C. 3
D. 5

Question 43:

• JAMB 2010

If x is inversely proportional to y and x = 2\(\frac{1}{2}\) when y = 2, find x if y = 4

A. 4
B. 5
C. 1\(\frac{1}{4}\)
D. 2\(\frac{1}{4}\)

Question 44:

• JAMB 2010

W is directly proportional to U. If W = 5 when U = 3, find U when W = \(\frac{2}{7}\)

A. \(\frac{6}{35}\)
B. \(\frac{10}{21}\)
C. \(\frac{21}{10}\)
D. \(\frac{35}{6}\)

Question 45:

• JAMB 2011

If x varies directly as square root of y and x = 81 when y = 9, Find x when y = 1\(\frac{7}{9}\)

A. 20\(\frac{1}{4}\)
B. 27
C. 2\(\frac{1}{4}\)
D. 36