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 831: In a restaurant, the cost of providing a particular type of food is partly constant and partially inversely proportional to the number of people. If cost per head for 100 people is 30k and the cost for 40 people is 60k, Find the cost for 50 people? Options:
  A) 15k
  B) 20k
  C) 50k
  D) 40k
  E) 45k
  Show Answer
  The correct answer is C .
• Question 832: Find the two values of y which satisfy the simultaneous equation 3x + y = 8, x² + xy = 6 Options:
  A) -1 and 5
  B) -5 and 1
  C) 1 and 5
  D) 1 and 1
  Show Answer
  The correct answer is A .
• Question 833: if 12 = x, find x where e = 12 Options:
  A) 20
  B) 15
  C) 14
  D) 12
  Show Answer
  The correct answer is A .
• Question 834: After getting a rise of 15%, a man's new monthly salary is ₦345. How much per month did he earn before the increase? Options:
  A) ₦330
  B) n396.75
  C) ₦300
  D) ₦293.25
  E) ₦360
  Show Answer
  The correct answer is C .
• Question 835:

  If y = x² - x - 12, find the range of values of x for which y $\ge$ 0,

  Options:
  A) -3 $<$ x $\le$ 4
  B) x $<$ -3 or x $>$ 4
  C) -3 $\le$ x $\le$ 4
  D) x $\le$ -3 or x $\ge$ 4
  Show Answer
  The correct answer is C .
• Question 836: If y = x sinx, find dy/dx when x = π/2. Options:
  A) -π/2
  B) -1
  C) 1
  D) π/2
  Show Answer
  The correct answer is C .
• Question 837:

  In triangle FGB, < G = 90°, < H = 60°, while in triangle XYZ, < X = 60° and < Y = 30°. Form XYZ write down the ratio equal to $\frac{FG}{FH}$

  Options:
  A) $\frac{YX}{ZX}$
  B) $\frac{YX}{YZ}$
  C) $\frac{ZX}{YZ}$
  D) $\frac{YZ}{XY}$
  Show Answer
  The correct answer is D .
• Question 838: Find the value of log${}_{\sqrt{3}}$ 81 Options:
  A) 81
  B) 16
  C) 8
  D) 3
  E) $\sqrt{3}$
  Show Answer
  The correct answer is C .
• Question 839:

  If the universal set μ = {x : 1 ≤ x ≤ 20} and

  A = {y : multiple of 3}

  B = |z : odd numbers}

  Find A ∩ B

  Options:
  A) {1, 3, 6}
  B) {3, 5, 9, 12}
  C) {3, 9, 15}
  D) {2, 3, 9}
  Show Answer
  The correct answer is C .
• Question 840: Which of these angles can be constructed using ruler and a pair of compasses only? Options:
  A) 115^o
  B) 125^o
  C) 135^o
  D) 145^o
  Show Answer
  The correct answer is C .