Jamb Mathematics 1979 Past Questions and Answers

Question 46:

• JAMB 1979

What is the greatest straight line distance between two vertices (corners) of a cube whose sides are 2239cm long?

A. \(\sqrt{2239cm}\)
B. \(\sqrt{2}\) x 2239cm
C. \(\frac{\sqrt{3}}{2}\) 2239cm
D. \(\sqrt{3}\) x 2239cm
E. 4478cm

Question 47:

• JAMB 1979

What is log₇(49^a) - log₁₀(0.01)?

A. \(\frac{49^a}{100}\)
B. \(\frac{a}{2}\) + 2
C. 7^2a + 2
D. 2a + 2
E. \(\frac{2a}{2}\)

Question 48:

• JAMB 1979

The size of a quantity first doubles and then increases by a further 16%. After a short time its size decreases by 16%. What is the net increases in size of the quantity?

A. \(\frac{59300}{625}\)
B. \(\frac{50900}{625}\)
C. 200%
D. +100%

Question 49:

• JAMB 1979

The following table relates the number of objects f corresponding to a certain size x. What is the average size of an object?
\(\begin{array}{c|c} f & 1 & 2 & 3 & 4 & 5 \\ \hline x & 1 & 2 & 4 & 8 & 16\end{array}\)

A. \(\frac{31}{15}\)
B. \(\frac{31}{5}\)
C. \(\frac{129}{5}\)
D. \(\frac{43}{5}\)
E. \(\frac{16}{5}\)

Question 50:

• JAMB 1979

If y = x² - 2x - 3, Find the least value of y and corresponding value of x

A. X = 3, y = 3
B. X = 1, y = -3
C. X = 4, y = 1
D. X = 1, y = -4
E. X = 2, y = -3