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 1491: The sum of the first three terms of a geometric progression is half its sum to infinity. Find the positive common ratio of the progression. Options:
  A) $\frac{1}{4}$
  B) $\sqrt{\frac{3}{2}}$
  C) $\frac{1}{\sqrt{3}}$
  D) $\frac{1}{\sqrt{2}}$
  Show Answer
  The correct answer is B .
• Question 1492: An $(n-2{)}^2$ sided figure has n diagonals, find the number n of diagonals for a 25 sided figure Options:
  A) 8
  B) 7
  C) 6
  D) 9
  E) 10
  Show Answer
  The correct answer is B .
• Question 1493:

  

  In the figure above, KL//NM, LN bisects < KNM. If angles KLN is 54${}^{\circ }$ and angle MKN is 35${}^{\circ }$, calculate the size of angle KMN.

  Options:
  A) 91${}^{\circ }$
  B) 89${}^{\circ }$
  C) 37${}^{\circ }$
  D) 19${}^{\circ }$
  Show Answer
  The correct answer is C .
• Question 1494: If m:n = 13:111, find m² - n² : (m + n)² Options:
  A) 1:11
  B) 1:13
  C) 1:10
  D) 1:12
  Show Answer
  The correct answer is D .
• Question 1495: 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 1496: if x is the addition of the prime numbers between 1 and 6; and y the H.C.F. of 6, 9, 15. Find the product of x and y Options:
  A) 27
  B) 30
  C) 33
  D) 90
  Show Answer
  The correct answer is B .
• Question 1497:

  $\begin{array}{cccccc}\text{Marks}& 1& 2& 3& 4& 5\\ \text{Frequency}& 2& 2& 8& 4& 4\end{array}$

  The table above shows the marks obtained in a given test. Find the mean mark.

  Options:
  A) 3.1
  B) 3.0
  C) 3.3
  D) 3.2
  Show Answer
  The correct answer is C .
• Question 1498: If cos x = $\sqrt{\frac{a}{b}}$ find coses x Options:
  A) $\frac{b}{\sqrt{b-a}}$
  B) $\sqrt{\frac{b}{a}}$
  C) $\sqrt{\frac{b}{b-a}}$
  D) $\sqrt{\frac{b-a}{a}}$
  Show Answer
  The correct answer is C .
• Question 1499: Simplify 7$\frac{1}{12}$ - 4$\frac{3}{2}$ + 2$\frac{1}{2}$ Options:
  A) 4
  B) 4$\frac{1}{6}$
  C) 4$\frac{5}{6}$
  D) 5$\frac{1}{6}$
  Show Answer
  The correct answer is C .
• Question 1500:

  Calculate the perimeter of a sector of a circle of radius 9cm and angle 36^o.

  Options:
  A) 18cm
  B) (18 + $\frac{9\pi }{5}$)cm
  C) (9 + $\frac{9\pi }{5}$)cm
  D) $\frac{9\pi }{5}$cm
  Show Answer
  The correct answer is B .