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 681: x varies directly as y and inversely as z. when x = 5, y = 2 and z = 1. What is the value of x when y = 5 and z = 2? Options:
  A) 2.5
  B) 5
  C) 6.25
  D) 6.52
  E) 7.5
  Show Answer
  The correct answer is C .
• Question 682: If three angles of a quadrilateral are (3y - x - z)^o, 3x^o, (2z - 2y - x)^o find the fourth angle in terms of x, y and z Options:
  A) (360 - x- y - z)^o
  B) (360 + x + y - z)^o
  C) (180 - x + y + z)^o
  D) (180 - x + y + z)^o
  Show Answer
  The correct answer is A .
• Question 683: The diagonals of a rhombus are 16cm and 30cm long. What is the perimeter of the rhombus Options:
  A) 68cm
  B) 72cm
  C) 80cm
  D) 88cm
  E) 92cm
  Show Answer
  The correct answer is A .
• Question 684:

  A machine valued at N20,000 depreciates by 10% every year. What will be the value of the machine at the end of two years?

  Options:
  A) N16,200
  B) N14,200
  C) N12,000
  D) N8,000
  Show Answer
  The correct answer is A .
• Question 685:

  P(-6, 1) and Q(6, 6) are the two ends of the diameter of a given circle. Calculate the radius.

  Options:
  A) 6.5 units
  B) 13.0 units
  C) 3.5 units
  D) 7.0 units
  Show Answer
  The correct answer is A .
• Question 686: Find the sum to infinity of the following series. 0.5 + 0.05 + 0.005 + 0.0005 + ..... Options:
  A) $\frac{5}{8}$
  B) $\frac{5}{7}$
  C) $\frac{5}{11}$
  D) $\frac{5}{9}$
  Show Answer
  The correct answer is D .
• Question 687: Find the mean deviation of 20, 25, 21, 27, 28, 29, to the nearest whole number Options:
  A) 2
  B) 3
  C) 4
  D) 5
  E) 6
  Show Answer
  The correct answer is B .
• Question 688: Simplify ($\frac{1}{\sqrt{5}+\sqrt{3}}-\frac{1}{\sqrt{5}-\sqrt{3}}$ x $\frac{1}{\sqrt{3}}$) Options:
  A) $\frac{\sqrt{3}}{\sqrt{5}}$
  B) $\frac{2\sqrt{3}}{7}$
  C) -2
  D) -1
  Show Answer
  The correct answer is B .
• Question 689: How many terms of the series 3, -6, +12, - 24, + ..... are needed to make a total of 1-2⁸? Options:
  A) 12
  B) 10
  C) 9
  D) 8
  Show Answer
  The correct answer is C .
• Question 690:

  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 .