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Mathematics Past Questions and Answers

Jamb 2019 Mathematics Questions

Question 46:
In the diagram above, O is the centre of the circle ABC, < ABO = 26° and < BOC = 130°. Calculate < AOC.
  • A 26°
  • B 13°
  • C 80°
  • D 102°
View Answer & Explanation
Question 47:
Each of the interior angles of a regular polygon is 140°. Calculate the sum of all the interior angles of the polygon.
  • A 1080°
  • B 1260°
  • C 2160°
  • D 1800°
View Answer & Explanation
Question 48:
A man bought a car newly for #1,250,000. He had a crash with the car and later sold it at the rate of #1,085,000. What is the percentage gain or loss of the man?
  • A 43.7% loss
  • B 13.2% gain
  • C 13.2% loss
  • D 43.7% gain
View Answer & Explanation
Question 49:
If the volume of a frustrum is given as \(V = \frac{\pi h}{3} (R^2 + Rr + r^2)\), find \(\frac{\mathrm d V}{\mathrm d R}\).
  • A \(\frac{\pi h}{3} (2R + r)\)
  • B \(2R + r + \frac{\pi h}{3}\)
  • C \(\frac{\pi h}{3} (2R^2 + r + 2r)\)
  • D \(\frac{2R^2}{3} \pi h\)
View Answer & Explanation
Question 50:
Express \((0.0439 \div 3.62)\) as a fraction.
  • A \(\frac{21}{100}\)
  • B \(\frac{21}{1000}\)
  • C \(\frac{12}{1000}\)
  • D \(\frac{12}{100}\)
View Answer & Explanation