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 1831: Calculate the length in cm. of the area of a circle of diameter 8cm which subtends an angle of 22$\frac{1}{2}$^o at the centre of the circle Options:
  A) 2$\pi$
  B) $\pi$
  C) $\frac{2}{3}$
  D) $\frac{\pi }{2}$
  Show Answer
  The correct answer is D .
• Question 1832:

  If a = $\frac{2x}{1-x}$ and b = $\frac{1+x}{1-x}$, then a² - b² in the simplest form is

  Options:
  A) $\frac{3x+1}{1-x}$
  B) $\frac{3x^2-1}{(x-1{)}^2}$
  C) $\frac{3x-2}{1-x}$
  D) $\frac{3x^2-1}{(x-1)}$
  Show Answer
  The correct answer is A .
• Question 1833:

  If (x - a) is a factor of bx - ax + x², find the other factor.

  Options:
  A) (x + b)
  B) (x - b)
  C) (a + b)
  D) (a - b)
  Show Answer
  The correct answer is A .
• Question 1834:

  

  In the diagram above, O is the centre of the circle, If < UOT = 70${}^{\circ }$ and < RST = 100${}^{\circ }$. Calculate < RUO

  Options:
  A) 20${}^{\circ }$
  B) 25${}^{\circ }$
  C) 50${}^{\circ }$
  D) 80${}^{\circ }$
  Show Answer
  The correct answer is B .
• Question 1835:

  A man sells different brands of an items. ${}^1{/}_9$ of the items he has in his shop are from Brand A, ${}^5{/}_8$ of the remainder are from Brand B and the rest are from Brand C. If the total number of Brand C items in the man's shop is 81, how many more Brand B items than Brand C does the shop has?

  Options:
  A) 243
  B) 108
  C) 54
  D) 135
  Show Answer
  The correct answer is C .
• Question 1836: Simplify $\frac{x}{x+y}$ + $\frac{y}{x-y}$ - $\frac{x^2}{x^2-y^2}$ Options:
  A) $\frac{x}{x^2-y^2}$
  B) $\frac{y^2}{x^2-y^2}$
  C) $\frac{x^2}{x^2-y^2}$
  D) $\frac{y}{x^2-y^2}$
  Show Answer
  The correct answer is B .
• Question 1837:

  Two dice are tossed. What is the probability that the total score is a prime number.

  Options:
  A) $\frac{5}{12}$
  B) $\frac{5}{9}$
  C) $\frac{1}{6}$
  D) $\frac{1}{3}$
  Show Answer
  The correct answer is A .
• Question 1838: 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 1839: Twenty girls and y boys sat on an examination. The mean marks obtained by the girls and boys were 52 and 57 respectively. if the total score for both girls and boys was 2950, find y. Options:
  A) 51
  B) 48
  C) 30
  D) 25
  E) 18
  Show Answer
  The correct answer is C .
• Question 1840:

  

  Three straight lines EF, GH and LK interest at O as shown above. If ∠KOF = 52${}^{\circ }$ and ∠LOH = 85${}^{\circ }$, calculate the size of ∠EOG.

  Options:
  A) 26${}^{\circ }$
  B) 43${}^{\circ }$
  C) 52${}^{\circ }$
  D) 85${}^{\circ }$
  Show Answer
  The correct answer is B .