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 71:

  

  In the figure, FGHJ is a circle of radius 3cm centre O. FOH, GOJ are perpendicular diameters. With G as centre of an arc of a circle is drawn to pass through F and H. Find the length of the perimeter of the lunar portion shaded.

  Options:
  A) 3$\pi$$\sqrt{2-1}$cm
  B) $\frac{9}{2}$$\pi$cm
  C) 3 $\pi$(1 + $\frac{2}{2}$)
  D) 3(1 + $\frac{2}{2}$)
  Show Answer
  The correct answer is C .
• Question 72: Make x the subject of the equation
  s = 2 + $\frac{t}{5}$(x + ⅗y) Options:
  A) x = 5[(s − 2) ÷ t] + 3yt
  B) x = 25[(s − 2) ÷ t] − 3ty
  C) x = [1 ÷ (s − 2)3ty]
  D) x = [5(s − 2) 2 ÷ 3ty] × t
  Show Answer
  The correct answer is B .
• Question 73: The mean of the numbers 1.2, 1.0, 0.9, 1.4, 0.8, 0.8, 1.2 and 1.1 is Options:
  A) 1.5
  B) 0.8
  C) 1.0
  D) 1.02
  E) 1.05
  Show Answer
  The correct answer is E .
• Question 74: When a dealer sells a bicycle for ₦81 he makes a profit of 80%. What did he pay for the bicycle? Options:
  A) ₦73
  B) ₦74.52
  C) ₦75
  D) ₦87.48
  E) ₦75.52
  Show Answer
  The correct answer is C .
• Question 75: A circle of perimeter 28cm is opened to form a square. What is the maximum possible area of the square? Options:
  A) 56cm²
  B) 49cm²
  C) 98cm²
  D) 28cm²
  Show Answer
  The correct answer is B .
• Question 76:

  Evaluate $\frac{0.8\times 0.43\times 0.031}{0.05\times 0.72\times 0.021}$ correct to four significant figures.

  Options:
  A) 14.09
  B) 14.1
  C) 14.12
  D) 14.11
  Show Answer
  The correct answer is D .
• Question 77: If the 2nd term of a G.P is $\frac{8}{9}$ and the 6th term is 4$\frac{1}{2}$. Find the common ratio. Options:
  A) 2
  B) $\frac{3}{2}$
  C) $\frac{2}{3}$
  D) 3
  Show Answer
  The correct answer is B .
• Question 78: The number 25 when when converted from the tens and units base to the binary base (base two) is one of the following Options:
  A) 10011
  B) 111011
  C) 111000
  D) 11001
  E) 110011
  Show Answer
  The correct answer is D .
• Question 79: If $\frac{9^{2x-1}}{{27}^{x+1}}=1$find the value of x. Options:
  A) 8
  B) 5
  C) 3
  D) 2
  Show Answer
  The correct answer is B .
• Question 80: One angle of a rhombus is 60^o. The shorter of the two diagonals is 8cm long. Find the length of the longer one. Options:
  A) 8$\sqrt{3}$
  B) $\frac{16}{\sqrt{3}}$
  C) $\sqrt{3}$
  D) $\frac{10}{\sqrt{3}}$
  Show Answer
  The correct answer is A .