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 111: The area of a square is 144 sqcm. Find the length of the diagonal. Options:
  A) 13 cm
  B) 12√2 cm
  C) 12 cm
  D) 11√3 cm
  Show Answer
  The correct answer is B .
• Question 112: An $(n-2{)}^2$ sided figure has n diagonals, find the number n of diagonals for a 25 sided figure Options:
  A) 8
  B) 7
  C) 6
  D) 9
  E) 10
  Show Answer
  The correct answer is B .
• Question 113: In $△$ XYZ, XY = 13cm, YZ = 9cm, XZ = 11cm and XYZ = $\theta$. Find cos$\theta$^o Options:
  A) $\frac{4}{39}$
  B) $\frac{43}{39}$
  C) $\frac{209}{3}$
  D) $\frac{43}{78}$
  Show Answer
  The correct answer is D .
• Question 114: Three boys shared some oranges. The first received ¹/₃ of the oranges and the second received ²/₃ of the remaining. If the third boy received the remaining 12 oranges, how many oranges did they share Options:
  A) 60
  B) 54
  C) 48
  D) 42
  Show Answer
  The correct answer is B .
• Question 115: Given that 1/2 log₁₀ P = 1, find the value Of P Options:
  A) 10⁴
  B) 10³
  C) 10²
  D) 10¹
  E) 10^-1
  Show Answer
  The correct answer is C .
• Question 116:

  

  The bar chart above shows the allotment of time(in minutes) per week for selected subjects in a certain school. What is the total time allocated to the six subjects per week?

  Options:
  A) 460mins
  B) 720mins
  C) 960mins
  D) 200mins
  Show Answer
  The correct answer is B .
• Question 117: 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 118:

  The second term of a geometric series is ${}^{-2}{/}_3$ and its sum to infinity is ${}^3{/}_2$. Find its common ratio.

  Options:
  A) ${}^{-1}{/}_3$
  B) 2
  C) ${}^4{/}_3$
  D) ${}^2{/}_9$
  Show Answer
  The correct answer is A .
• Question 119: Simplify 5$\sqrt{18}$ - 3$\sqrt{72}$ + 4$\sqrt{50}$ Options:
  A) 17$\sqrt{4}$
  B) 4$\sqrt{17}$
  C) 17$\sqrt{2}$
  D) 12$\sqrt{4}$
  Show Answer
  The correct answer is C .
• Question 120: Express $\frac{1}{x+1}$ - $\frac{1}{x-2}$ as a single algebraic fraction Options:
  A) $\frac{-3}{(x+1)(2-x)}$
  B) $\frac{3}{(x+1)(2-x)}$
  C) $\frac{-1}{(x+1)}$
  D) $\frac{1}{(x+1)(x-2)}$
  Show Answer
  The correct answer is A .