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 1521:

  Find the matrix A

  A $\left[\begin{array}{cc}0& 1\\ 2& -1\end{array}\right]$ =$\left[\begin{array}{cc}2& -1\\ 1& 0\end{array}\right]$

  Options:
  A) $\left[\begin{array}{cc}2& 1\\ {-}^1{/}_2& {-}^1{/}_2\end{array}\right]$
  B) $\left[\begin{array}{cc}0& 1\\ {}^1{/}_2& {}^1{/}_2\end{array}\right]$
  C) $\left[\begin{array}{cc}2& 1\\ 0& -1\end{array}\right]$
  D) $\left[\begin{array}{cc}2& 1\\ {}^1{/}_2& -2\end{array}\right]$
  Show Answer
  The correct answer is B .
• Question 1522: Find the value of ${\int }_0^{\pi }\frac{co{s}^2\theta -1}{si{n}^2\theta }d\theta$ Options:
  A) π
  B) π/2
  C) -π/2
  D) -π
  Show Answer
  The correct answer is D .
• Question 1523: The binary operation on the set of real numbers is defined by m*n = $\frac{mn}{2}$ for all m, n $\in$ R. If the identity element is 2, find the inverse of -5 Options:
  A) $-\frac{4}{5}$
  B) $-\frac{2}{5}$
  C) 4
  D) 5
  Show Answer
  The correct answer is A .
• Question 1524: If y = x Sin x, find $\frac{dy}{dx}$ when x = $\frac{\pi }{2}$ Options:
  A) $\frac{-\pi }{2}$
  B) -1
  C) 1
  D) $\frac{\pi }{2}$
  Show Answer
  The correct answer is C .
• Question 1525: The graph of f(x) = x² - 5x + 6 crosses the x-axis at the points Options:
  A) (-6, 0), (-1, 0)
  B) (-3, 0), (-2,0)
  C) (-6, 0),(1, 0)
  D) (2, 0), (3, 0)
  Show Answer
  The correct answer is D .
• Question 1526:

  A man's initial salary is ₦540.00 a month and increases after each period of six months by ₦36.00 a month. Find his salary in the eight month of the third year.

  Options:
  A) ₦828.00
  B) ₦756.00
  C) ₦720.00
  D) ₦684.00
  Show Answer
  The correct answer is C .
• Question 1527:

  Make q the subject of the formula in the equation $\frac{mn}{a^2}-\frac{pq}{b^2}=1$

  Options:
  A) $q=\frac{b^2(mn-a^2)}{a^{2}p}$
  B) $q=\frac{m^{2}n-a^2}{p^2}$
  C) $q=\frac{mn-2b^2}{a^2}$
  D) $q=\frac{b^2(n^2-m{a}^2)}{n}$
  Show Answer
  The correct answer is A .
• Question 1528:

  The ages of students in a small primary school were recorded in the table below.

  Age	5 - 6	7 - 8	9 -10
  Frequency	29	40	38

  
  Estimate the mean

  Options:
  A) 7.7
  B) 7.5
  C) 7.8
  D) 7.6
  Show Answer
  The correct answer is A .
• Question 1529: If x - 4 is a factor of x² - x - k, then k is Options:
  A) 4
  B) 12
  C) 20
  D) 2
  Show Answer
  The correct answer is B .
• Question 1530: if X = {n² + 1 : n = 0, 2, 3} and y = {n + 1 : n = 2, 3, 4, 5}, find x ∩ y Options:
  A) {1, 3}
  B) {5,10}
  C) $\mathrm{\Phi }$
  D) (4, 6)
  Show Answer
  The correct answer is C .