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 1741: Factorize $x^2-2x-15$ Options:
  A) (x + 3)²
  B) (x + 5)(x − 3)
  C) (x − 5)²
  D) (x − 5)(x + 3)
  Show Answer
  The correct answer is D .
• Question 1742: If α and β are the roots of the equation 3x² + bx − 2 = 0. Find the value of $\frac{1}{\alpha }$ + $\frac{1}{\beta }$ Options:
  A) $\frac{-5}{3}$
  B) $\frac{-2}{3}$
  C) $\frac{1}{2}$
  D) $\frac{5}{2}$
  Show Answer
  The correct answer is D .
• Question 1743:

  The table below gives the scores of a group of students in a Mathematical test.

  $\begin{array}{ccccccccc}Scores& 1& 2& 3& 4& 5& 6& 7& 8\\ Frequency& 2& 4& 7& 14& 12& 6& 4& 1\end{array}$

  If the mode in m and the number of students who scored 4 or less is s. What is (s, m)?

  Options:
  A) (27, 4)
  B) (14,4)
  C) (13,4)
  D) (4,4)
  Show Answer
  The correct answer is A .
• Question 1744:
  

  The pie chart shows the income of a civil servant in month. If his monthly income is N6,000. Find his monthly basic salary.

  Options:
  A) N2,050
  B) N2600
  C) N3,100
  D) N3,450
  Show Answer
  The correct answer is A .
• Question 1745: One angle of a rhombus is 60^o. The shorter of the two diagonals is 8cm long. Find the length of the longer one. Options:
  A) 8$\sqrt{3}$
  B) $\frac{16}{\sqrt{3}}$
  C) $\sqrt{3}$
  D) $\frac{10}{\sqrt{3}}$
  Show Answer
  The correct answer is A .
• Question 1746: The ratio of the areas of similar triangles is necessarily equal to Options:
  A) the ratio of the corresponding sides
  B) the ratio of the squares on corresponsing sides
  C) the ratio of the corresponding heights of the triangles
  D) half the ratio of the corresponding heights of the triangles
  E) the ratio of the corresponding bases to the heights of the triangles
  Show Answer
  The correct answer is C .
• Question 1747:

  Find the roots of x³ - 2x² - 5x + 6 = 0

  Options:
  A) 1, -2, 3
  B) 1, 2, -3
  C) -1, -2, 3
  D) -1, 2, -3
  Show Answer
  The correct answer is A .
• Question 1748: A trader bought goats for N4000 each. He sold them for N180,000 at a loss of 25%. How many goats did he buy? Options:
  A) 60
  B) 50
  C) 45
  D) 36
  Show Answer
  The correct answer is A .
• Question 1749: Given distribution of color beads: blue, black, yellow, white and brown with frequencies 1, 2, 3, 4, and 5 respectively. Find the probability that a bead picked at random will be blue or white. Options:
  A) 7/15
  B) 2/5
  C) 1/3
  D) 1/15
  Show Answer
  The correct answer is C .
• Question 1750:

  The table shown gives the marks scored by a group of student in a test. Use the table to answer the question given.

  Mark	0	1	2	3	4	5
  Frequency	1	2	7	5	4	3

  What is the probability of selecting a student from the group that scored 2 or 3?

  Options:
  A) $\frac{1}{11}$
  B) $\frac{5}{22}$
  C) $\frac{7}{22}$
  D) $\frac{6}{11}$
  Show Answer
  The correct answer is D .