# 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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