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.

31. If P varies inversely as the square root of q, where p = 3 and q = 16, find the value of q when p = 4.

  • A. 12
  • B. 8
  • C. 9
  • D. 16

32.  Tade bought 200 mangoes at 4 for ₦2.50. 30 out of the mangoes got spoilt and the remaining were sold at 2 for ₦2.40. Find the percentage profit or loss.

  • A. 43.6% loss
  • B. 35% profit
  • C. 63.2% profit
  • D. 28% loss

33.  The simple interest on ₦8550 for 3 years at x% per annum is ₦4890. Calculate the value of x to the nearest whole number.

  • A. 19%
  • B. 20%
  • C. 25%
  • D. 16.3%

34. Simplify 81\(^{\frac{-3}{4}}\) x 25\(^{\frac{1}{2}}\) x 243\(^{\frac{2}{5}}\)

  • A.\(\frac{2}{5}\)
  • B.\(\frac{3}{5}\)
  • C.\(\frac{5}{2}\)
  • D.\(\frac{5}{3}\)

35.  Find the value of \(\frac{(0.5436)^3}{0.017 \times 0.219}\) to 3 significant figures.

  • A. 46.2
  • B. 43.1
  • C. 534
  • D. 431

36.  If S = (4t + 3)(t – 2), find ds/dt when t = 5 secs.

  • A. 50 units per sec
  • B. 35 units per sec
  • C. 22 units per sec
  • D. 13 units per sec

37.  The angles of a polygon are given by 2x, 5x, x and 4x respectively. The value of x is

  • A. 31°
  • B. 30°
  • C. 26°
  • D. 48°

38. The weight of a day-old chick was measured to be 0.21g. If the actual weight of the chick is 0.18g, what was the percentage error in the measurement?

  • A. 15.5%
  • B. 18.2%
  • C. 14.8%
  • D. 16.7%

39. Evaluate \((\frac{6}{0.32} \div \frac{2}{0.084})^{-1}\) correct to 1 decimal place.

  • A. 1.3
  • B. 2.5
  • C. 4.6
  • D. 3.2

40. If 2\(^{x + y}\) = 16 and 4\(^{x – y} = \frac{1}{32}\), find the values of x and y.

  • A. x = \(\frac{3}{4}\), y = \(\frac{11}{4}\)
  • B. x = \(\frac{3}{4}\), y = \(\frac{13}{4}\)
  • C. x = \(\frac{2}{3}\), y = \(\frac{4}{5}\)
  • D. x = \(\frac{2}{3}\), y = \(\frac{13}{4}\)
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