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Thursday, 29 October 2026
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Mathematics Past Questions and Answers

Jamb 1979 Mathematics Questions

Question 36:
What is log7(49a) - log10(0.01)?
  • A \(\frac{49^a}{100}\)
  • B \(\frac{a}{2}\) + 2
  • C 7<sup style='font-size: smaller;'>2a</sup> + 2
  • D 2a + 2
  • E \(\frac{2a}{2}\)
View Answer & Explanation
Question 37:
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%
View Answer & Explanation
Question 38:
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 \(\frac{16}{5}\)
View Answer & Explanation
Question 39:
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
View Answer & Explanation
Question 40:
A father is now three times as old as his son. Twelve years ago he was six times as old as his son. How old are the son and the father?
  • A 20 and 45
  • B 100 and 150
  • C 45 and 65
  • D 35 and 75
  • E 20 and 60
View Answer & Explanation