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 1881: 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 1882: In a class of 150 students, the sector in a pie chart representing the students offering Physics has angle 12^o. How many students are offering Physics? Options:
  A) 18
  B) 15
  C) 10
  D) 5
  Show Answer
  The correct answer is D .
• Question 1883: Evaluate $\frac{\frac{1}{10}\times \frac{2}{3}+\frac{1}{4}}{\frac{\frac{1}{2}}{\frac{3}{5}}-\frac{1}{4}}$ Options:
  A) $\frac{7}{12}$
  B) $\frac{19}{35}$
  C) $\frac{2}{25}$
  D) $\frac{19}{60}$
  Show Answer
  The correct answer is B .
• Question 1884: The inverse of matrix N = $\left|\begin{array}{cc}2& 3\\ 1& 4\end{array}\right|$ is Options:
  A) $\frac{1}{5}$ $\left|\begin{array}{cc}2& 1\\ 3& 4\end{array}\right|$
  B) $\frac{1}{5}$ $\left|\begin{array}{cc}4& -3\\ -1& 2\end{array}\right|$
  C) $\frac{1}{5}$ $\left|\begin{array}{cc}2& -1\\ -3& 4\end{array}\right|$
  D) $\frac{1}{5}$ $\left|\begin{array}{cc}4& 3\\ 1& 2\end{array}\right|$
  Show Answer
  The correct answer is B .
• Question 1885:

  Find the standard deviation of 2,3,8,10 and 12

  Options:
  A) 3.9
  B) 4.9
  C) 5.9
  D) 6.9
  Show Answer
  The correct answer is A .
• Question 1886:

  A right circular cone has a base radius r cm and a vertical angle 2y^o. The height of the cone is

  Options:
  A) r tan y^o cm
  B) r sin y^o cm
  C) r cot y^o cm
  D) r cos y^o cm
  E) r cosec y^o cm
  Show Answer
  The correct answer is A .
• Question 1887:

  

  The table above shows the frequency distribution of the ages (in years) of pupils in a certain secondary school. What percentage of the total number of pupils is over 15 years but less than 21 years?

  Options:
  A) 35%
  B) 45%
  C) 50%
  D) 60%
  Show Answer
  The correct answer is C .
• Question 1888: The operation * on the set R of real number is defined by x * y = 3x + 2y − 1, find 3* − 1 Options:
  A) 9
  B) - 9
  C) 6
  D) - 6
  Show Answer
  The correct answer is C .
• Question 1889:

  Without using tables, evaluate (343)^1/3 x (

  0.14)^-1 x (25)^-1/2

  Options:
  A) 10
  B) 12
  C) 8
  D) 7
  Show Answer
  The correct answer is A .
• Question 1890: An arc subtends an angle of 30^o at the centre of a circle radius 12cm. Calculate the length of the arc. Options:
  A) 6$\pi$cm
  B) 2$\pi$cm
  C) 3$\pi$cm
  D) 9$\pi$cm
  Show Answer
  The correct answer is B .