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 51: 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 52: Solve the inequalities -6 $\le$ 4 - 2x < 5 - x. Options:
  A) -1 < x < 5
  B) -1 < x $\le$ 5
  C) -1 $\le$ x $\le$ 6
  D) -1 $\le$ x < 6
  Show Answer
  The correct answer is B .
• Question 53:

  Express 495g as a percentage of 16.5kg

  Options:
  A) 3%
  B) 3 $\frac{1}{3}$%
  C) 15%
  D) 30%
  Show Answer
  The correct answer is A .
• Question 54:

  

  Use the cumulative frequency curve to answer the question.
  Estimate the median of the date represented on the graph.

  Options:
  A) 35.5
  B) 36.5
  C) 37.5
  D) 38.5
  Show Answer
  The correct answer is A .
• Question 55: The graphical method of solving the equation x³ + 3x² + 4x - 28 = 0 is by drawing the graphs of the curves Options:
  A) y = x³ and y = 3x² + x - 28
  B) y = x³ + 3x² + 4x + 4 and the line y = $\frac{28}{x}$
  C) y = x³ + 3x² + 4x and y
  D) y = x² + 3x + 4 and y = $\frac{28}{x}$
  E) y = x² + 3x + 4 and line y = 28x
  Show Answer
  The correct answer is D .
• Question 56: 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 57:

  ⊗	k	l	m
  k	l	m	k
  l	m	k	l
  m	k	l	m

  The identity element with respect to the multiplication shown in the table above is

  Options:
  A) o
  B) m
  C) l
  D) k
  Show Answer
  The correct answer is B .
• Question 58: Convert 3.1415926 to 5 decimal places Options:
  A) 3.14160
  B) 3.14159
  C) 0.31415
  D) 3.14200
  Show Answer
  The correct answer is B .
• Question 59: Find the derivative of $y=\frac{x^7-x^5}{x^4}$ Options:
  A) x(x²-1)
  B) 3x(x²-1)
  C) 3x²-1
  D) 7x⁶-5x⁴
  Show Answer
  The correct answer is C .
• Question 60: 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 .