Mathematics Exam Past Questions and Answers | JAMB, WAEC and NECO

Mathematics looks at measurement, relationships, and properties of numbers and groups using numbers and symbols. Important topics in math include arithmetic, algebra, geometry, and calculus.

• Question 1171: If x varies directly as square root of y and x = 81 when y = 9, Find x when y = 1$\frac{7}{9}$ Options:
  A) 20$\frac{1}{4}$
  B) 27
  C) 2$\frac{1}{4}$
  D) 36
  Show Answer
  The correct answer is D .
• Question 1172:

  Given that $\theta$ is an acute angle and sin $\theta$ = $\frac{m}{n}$, find cos $\theta$

  Options:
  A) $\frac{\sqrt{n^2-m^2}}{m}$
  B) $\frac{\sqrt{(n+m)(n-m)}}{n}$
  C) $\frac{m}{\sqrt{n^2-m^2}}$
  D) $\sqrt{\frac{n}{n^2-m^2}}$
  Show Answer
  The correct answer is B .
• Question 1173: If y = 3 cos(x/3), find dy/dx when x = (3π/2) Options:
  A) 1
  B) -3
  C) 2
  D) -1
  Show Answer
  The correct answer is D .
• Question 1174: The cost of production of an article is made up as follows: Labour ₦70, Power ₦15, Materials ₦30, Miscellaneous ₦5. Find the angle of the sector representing Labour in a pie chart Options:
  A) 210^o
  B) 105^o
  C) 105^o
  D) 175^o
  E) 90^o
  Show Answer
  The correct answer is A .
• Question 1175: Solve for r in the following equation $\frac{1}{r-1}$ + $\frac{2}{r+1}$ = $\frac{3}{r}$ Options:
  A) 3
  B) 4
  C) 5
  D) 6
  Show Answer
  The correct answer is A .
• Question 1176:

  Let P = {1, 2, u, v, w, x}; Q = {2, 3, u, v, w, 5, 6, y} and R = {2, 3, 4, v, x, y}.

  Determine (P-Q) ∩ R

  Options:
  A) {1, x}
  B) {x y}
  C) {x}
  D) ɸ
  Show Answer
  The correct answer is C .
• Question 1177:

  

  In the figure, if XZ is 10cm, calculate RY in cm.

  Options:
  A) 10
  B) 10(1 - $\frac{1}{\sqrt{3}}$)
  C) 10(1 - $\frac{1}{\sqrt{2}}$)
  D) 10[1 - $\sqrt{3}$]
  Show Answer
  The correct answer is B .
• Question 1178: x varies directly as the product of u and v and inversely as their sum. If x = 3 when u = 3 and v = 1, what is the value of x if u = 3 and v = 3? Options:
  A) 3
  B) 4
  C) 6
  D) 9
  Show Answer
  The correct answer is C .
• Question 1179: Find the locus of point equidistant from two straight lines y - 5 = 0 and y - 3 = 0 Options:
  A) y - 2 = 0
  B) y - 4 = 0
  C) y - 1 = 0
  D) y - 3 = 0
  Show Answer
  The correct answer is B .
• Question 1180: Find n if 34_n = 10011₂ Options:
  A) 5
  B) 6
  C) 7
  D) 8
  Show Answer
  The correct answer is A .