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 711: Calculate the standard deviation of the following data: 7, 8, 9, 10, 11, 12, 13. Options:
  A) 2
  B) 4
  C) 10
  D) 11
  Show Answer
  The correct answer is A .
• Question 712:

  

  Find the value of x in the diagram.

  Options:
  A) 50^o
  B) 60^o
  C) 70^o
  D) 80^o
  Show Answer
  The correct answer is C .
• Question 713: Determine the locus of a point inside a square PQRS which is eqidistant from PQ and QR Options:
  A) The diagonal QS
  B) the perpendicular bisector of PQ
  C) The diagonal PR
  D) side SR
  Show Answer
  The correct answer is A .
• Question 714: Simplify $\sqrt{160r^2}$ + $\sqrt{71r^4}$ + $\sqrt{100r^2}$ Options:
  A) 9r²
  B) 12$\sqrt{3r}$
  C) 13r
  D) $\sqrt{13r}$
  Show Answer
  The correct answer is C .
• Question 715:

  A box contains two red balls and four blue balls. A ball is drawn at random from the box and then replaced before a second ball is drawn. Find the probability of drawing two red balls.

  Options:
  A) $\frac{2}{3}$
  B) $\frac{1}{3}$
  C) $\frac{1}{4}$
  D) $\frac{1}{9}$
  Show Answer
  The correct answer is D .
• Question 716:

  $\begin{array}{ccccccccc}\text{Marks}& 2& 3& 4& 5& 6& 7& 8& 9\\ \text{No. of students}& 3& 4& 1& 0& 4& 5& 2& 1\end{array}$

  The table above shows the distribution of marks of students in a test. Find the probability of passing the test if the pass mark is 5.

  Options:
  A) $\frac{3}{5}$
  B) $\frac{2}{5}$
  C) $\frac{7}{20}$
  D) $\frac{1}{5}$
  Show Answer
  The correct answer is A .
• Question 717:

  A wire was shaped to form a square of area 81cm². An equilateral triangle was formed by the same wire,What is the length of a side of the triangle formed?

  Options:
  A) 3cm
  B) 6cm
  C) 9cm
  D) 12cm
  E) 27cm
  Show Answer
  The correct answer is D .
• Question 718:

  A man runs a distance of 9km at a constant speed for the first 4 km and then 2 km\h faster for the rest of the distance. The whole run takes him one hour. His average speed for the first 4 km is

  Options:
  A) 6 km/h
  B) 8 km/h
  C) 9 km\h
  D) 11 km\h
  E) 13 km\h
  Show Answer
  The correct answer is B .
• Question 719: If 2x² - kx - 12 is divisible by x-4, Find the value of k. Options:
  A) 4
  B) 5
  C) 6
  D) 7
  Show Answer
  The correct answer is B .
• Question 720:

  Given the matrix $A=\left|\begin{array}{cc}3& -2\\ 1& 6\end{array}\right|$. Find the inverse of matrix A.

  Options:
  A) $\left|\begin{array}{cc}6& 2\\ 1& 6\end{array}\right|$
  B) $\left|\begin{array}{cc}\frac{2}{11}& \frac{1}{12}\\ \frac{3}{20}& \frac{1}{10}\end{array}\right|$
  C) $\left|\begin{array}{cc}-3& 2\\ -1& -6\end{array}\right|$
  D) $\left|\begin{array}{cc}\frac{3}{10}& \frac{1}{10}\\ \frac{-1}{20}& \frac{3}{20}\end{array}\right|$
  Show Answer
  The correct answer is D .