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 2161: Find the inverse $\left|\begin{array}{cc}5& 3\\ 6& 4\end{array}\right|$ Options:
  A) $\left|\begin{array}{cc}2& -\frac{3}{2}\\ -3& -\frac{5}{2}\end{array}\right|$
  B) $\left|\begin{array}{cc}2& -\frac{3}{2}\\ -3& \frac{5}{2}\end{array}\right|$
  C) $\left|\begin{array}{cc}2& \frac{3}{2}\\ -3& \frac{5}{2}\end{array}\right|$
  D) $\left|\begin{array}{cc}2& \frac{3}{2}\\ -3& \frac{5}{2}\end{array}\right|$
  Show Answer
  The correct answer is B .
• Question 2162:

  Evaluate $\frac{{27}^{\frac{1}{3}}-8^{\frac{2}{3}}}{{16}^{\frac{2}{4}}\times 2}$

  Options:
  A) $\frac{23}{5}$
  B) -$\frac{23}{5}$
  C) $\frac{1}{8}$
  D) $\frac{21}{7}$
  Show Answer
  The correct answer is C .
• Question 2163: The curved surface area of a cylinder 5cm high is 110cm². Find the radius of its base
  π = $\frac{22}{7}$ Options:
  A) 2.6cm
  B) 3.5cm
  C) 3.6cm
  D) 7.0cm
  Show Answer
  The correct answer is B .
• Question 2164:

  Find the length of a chord 3cm from the centre of a circle of radius 5cm

  Options:
  A) 8cm
  B) 5.6cm
  C) 7cm
  D) 6.5cm
  Show Answer
  The correct answer is A .
• Question 2165: Using the graph find the values of p and q if px + qy $\ge$ 4 Options:
  A) p = 2, q = -1
  B) p = -1, q = 2
  C) p = 2, q = 2
  D) p = 1, q = 2
  Show Answer
  The correct answer is B .
• Question 2166: THe cost of renovating a 6 m square room is N540. What is the cost of renovating a 9 m square room? Options:
  A) N1215
  B) N720
  C) N1620
  D) N810
  Show Answer
  The correct answer is D .
• Question 2167: If $\frac{9^{2x-1}}{{27}^{x+1}}=1$find the value of x. Options:
  A) 8
  B) 5
  C) 3
  D) 2
  Show Answer
  The correct answer is B .
• Question 2168: A flagstaff stands on the top of a vertical tower. A man standing 60 m away from the tower observes that the angles of elevation of the top and bottom of the flagstaff are 64^o and 62^o respectively. Find the length of the flagstaff. Options:
  A) 60 (tan 62^o - tan 64^o)
  B) 60 (cot 64^o - cot 62^o)
  C) 60 (cot 62^o - cot 64^o)
  D) 60 (tan 64^o - tan 62^o)
  Show Answer
  The correct answer is D .
• Question 2169: Evaluate $\frac{81.81+99.44}{20.09+36.16}$ correct to 3 significant figures. Options:
  A) 6.21
  B) 3.22
  C) 2.78
  D) 2.13
  Show Answer
  The correct answer is B .
• Question 2170:

  The weight of a day-old chick was measured to be 0.21g. If the actual weight of the chick is 0.18g, what was the percentage error in the measurement?

  Options:
  A) 15.5%
  B) 18.2%
  C) 14.8%
  D) 16.7%
  Show Answer
  The correct answer is D .