Mathematics 2019 Past Questions | JAMB

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

41. 
Simplify \(\frac{0.0839 \times 6.381}{5.44}\) to 2 significant figures.

  • A. 0.2809
  • B. 2.51
  • C. 3.5
  • D. 0.098
  •  

42. Find the value of x and y in the simultaneous equation: 3x + y = 21; xy = 30

  • A. x = 3 or 7, y = 12 or 8
  • B. x = 6 or 1, y = 11 or 5
  • C. x = 2 or 5, y = 15 or 6
  • D. x = 1 or 5, y = 10 or 7

43. Points X and Y are 20km North and 9km East of point O, respectively. What is the bearing of Y from X? Correct to the nearest degree.

  • A. 24°
  • B. 56°
  • C. 127°
  • D. 156°
44. If \(P = (\frac{Q(R – T)}{15})^{\frac{1}{3}}\), make T the subject of the formula.
 
  • A. \(T = \frac{15R – Q}{P^3}\)
  • B. \(T = R – \frac{15P^3}{Q}\)
  • C. \(T = \frac{R – 15P^3}{Q}\)
  • D. \(T = \frac{R + P^3}{15Q}\)

45. IMG 20191217 101123%20%282%29

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°

46. 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°

47. 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

48. 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. \(\frac{2R^2}{3} \pi h\)

49.  Express \((0.0439 \div 3.62)\) as a fraction.

  • A.\(\frac{21}{100}\)
  • B.\(\frac{21}{1000}\)
  • C.\(\frac{12}{1000}\)
  • D.\(\frac{12}{100}\)

50. If \(25^{1 – x} \times 5^{x + 2} \div (\frac{1}{125})^{x} = 625^{-1}\), find the value of x.

  • A. x = -4
  • B. x = 2
  • C. x = -2
  • D. x = 4
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