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 2081: What is the value of k if the mid-point of the line joining (1 - k, - 4) and (2, k + 1) is (-k , k)? Options:
  A) -3
  B) -1
  C) -4
  D) -2
  Show Answer
  The correct answer is A .
• Question 2082: The angle of elevation of a building from a measuring instrument placed on the ground is 30^o. If the building is 40m high, how far is the instrument from the foot of the building? Options:
  A) $\frac{20}{\surd 3}$m
  B) $\frac{40}{\surd 3}$m
  C) 20√3m
  D) 40√3m
  Show Answer
  The correct answer is D .
• Question 2083: 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 2084: Find the sum of the range and the mode of the set of numbers 10, 9, 10, 9, 8, 7, 7, 10, 8, 10, 8, 4, 6, 9, 10, 9, 10, 9, 7, 10, 6, 5 Options:
  A) 16
  B) 14
  C) 12
  D) 10
  Show Answer
  The correct answer is A .
• Question 2085:

  Factorize 4a${}^2$ - 9b${}^2$

  Options:
  A) (2a-3b) (2a+3b)
  B) (2a-b) (2a+3b)
  C) (2a-3b) (a+3b)
  D) (a-3b) (a+3b)
  Show Answer
  The correct answer is A .
• Question 2086: Simplify $\frac{\sqrt{2}}{\sqrt{3}-\sqrt{2}}$ - $\frac{3-2}{\sqrt{3}+\sqrt{2}}$ Options:
  A) 2$\sqrt{2}-\sqrt{3}$
  B) 3($\sqrt{6}$ - 1)
  C) $\sqrt{6}$ - 3
  D) -$\frac{1}{2}$
  E) $\frac{-\sqrt{3}}{\sqrt{2}-\sqrt{2}}$
  Show Answer
  The correct answer is B .
• Question 2087:

  Correct each of the numbers 59.81798 and 0.0746829 to three significant figures and multiply them, giving your answer to three significant figures

  Options:
  A) 4.46
  B) 4.48
  C) 4.47
  D) 4.49
  E) 4.50
  Show Answer
  The correct answer is C .
• Question 2088: In a regular polygon, each interior angle doubles its corresponding exterior angle. Find the number of sides of the polygon. Options:
  A) 8
  B) 6
  C) 4
  D) 3
  Show Answer
  The correct answer is B .
• Question 2089: Evaluate ${\int }_1^2(6x^2-2x)dx$ Options:
  A) 16
  B) 13
  C) 12
  D) 11
  Show Answer
  The correct answer is D .
• Question 2090: A bag contains 4 blue and 8 red identical balls. If two balls are picked at random with replacement, what is the probability of picking two balls of different colours? Options:
  A) 1
  B) $\frac{13}{26}$
  C) $\frac{5}{18}$
  D) $\frac{4}{9}$
  E) $\frac{2}{9}$
  Show Answer
  The correct answer is D .