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 381:

  How many sides has a regular polygon whose interior angles are 120° each?

  Options:
  A) 4
  B) 5
  C) 6
  D) 3
  Show Answer
  The correct answer is C .
• Question 382:
  

  A trapezium has two parallel sides of lengths 5cm and 9cm. If the area is 91cm${}^2$, find the distance between the parallel sides

  Options:
  A) 13 cm
  B) 4 cm
  C) 6 cm
  D) 7 cm
  Show Answer
  The correct answer is A .
• Question 383: An arc of the length 16$\pi$cm subtends an angle of 80^o at the centre of the circle. Find the radius of the circle. Options:
  A) 24cm
  B) 28cm
  C) 36cm
  D) 32cm
  Show Answer
  The correct answer is C .
• Question 384: Find the integral values of x and y satisfying the inequality 3y + 5x $\le$ 15, given that y > 0, y < 3 and x > 0. Options:
  A) (1,1), (1,2), (1,3)
  B) (1,1), (2,1), (1,3)
  C) (1,1), (3,1), (2,2)
  D) (1,1), (1,2), (2,1)
  Show Answer
  The correct answer is D .
• Question 385:

  The probability of an event A is 1/5. The probability of B is 1/3 . The probability both A and B is 1/15. What is the probability of either event A or B or both?

  Options:
  A) $\frac{2}{15}$
  B) $\frac{3}{4}$
  C) $\frac{7}{15}$
  D) $\frac{1}{15}$
  Show Answer
  The correct answer is C .
• Question 386:

  $\begin{array}{cccc}class& 1-3& 4-6& 7-9\\ Frequency& 5& 8& 5\end{array}$

  Find the standard deviation of the data using the table above

  Options:
  A) 5
  B) \(\sqrt{6}\0
  C) $\frac{5}{3}$
  D) $\sqrt{5}$
  Show Answer
  The correct answer is A .
• Question 387: What is the locus of the mid-points of all chords of length 6cm within a circle of radius 5cm and with centre 0 Options:
  A) A circle of radius 4 cm and with centre O
  B) The perpendicular bisector of the chords
  C) a straight line passing through centre O
  D) A circle of radius 6 cm and with centre O
  Show Answer
  The correct answer is A .
• Question 388: 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 389:

  Fifty boxes each of 50 bolts were inspected for the number which were defective. The following was the result:

  $\begin{array}{ccccccc}\text{No. defective per box}& 4& 5& 6& 7& 8& 9\\ \text{No. of boxes}& 2& 7& 17& 10& 8& 6\end{array}$

  Find the percentage of boxes containing at least 5 defective bolts each.

  Options:
  A) 96
  B) 94
  C) 92
  D) 90
  Show Answer
  The correct answer is A .
• Question 390: The solution to the quadratic equation 5 + 3x - 2x² = 0 is Options:
  A) ($\frac{5}{2}$, 1)
  B) (5, 3)
  C) -($\frac{5}{2}$, -1)
  D) ($\frac{5}{2}$, -1)
  Show Answer
  The correct answer is D .