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 21:

  Find the mean deviation of 1, 2, 3 and 4

  Options:
  A) 1.0
  B) 1.5
  C) 2.0
  D) 2.5
  Show Answer
  The correct answer is A .
• Question 22: A rectangular polygon has 150^o as the size of each interior angle. How many sides has the polygon? Options:
  A) 12
  B) 10
  C) 9
  D) 8
  Show Answer
  The correct answer is A .
• Question 23: If n is the median and m is the mode of the following set of numbers, 2.4, 2.1, 1.6, 2.6, 2.6, 3.7, 2.1, 2.6, then (n, m) is Options:
  A) (2.6, 2.6)
  B) (2.5, 2.6)
  C) (2.6, 2.5)
  D) (2.5, 2.1)
  Show Answer
  The correct answer is B .
• Question 24:

  The table below is drawn for a graph y = x³ - 3x + 1.

  $\begin{array}{cccccccc}x& -3& -2& -1& 0& 1& 2& 3\\ y=x^3-3x+1& 1& -1& 3& 1& -1& 3& 1\end{array}$

  From x = -2 to x = 1, the graph crosses the x-axis in the range(s)

  Options:
  A) -1 < x < 0 and 0 < x < 1
  B) -2 < x < -1 and 0 < x < 1
  C) -2 < x < -1 and -1 < x < 0
  D) 0 < x < 1
  Show Answer
  The correct answer is B .
• Question 25: Evaluate $\frac{(18{)}^{\frac{3}{4}}-(27{)}^3}{3\times 2^3}$ Options:
  A) 27
  B) 1
  C) $\frac{1}{3}$
  D) $\frac{1}{8}$
  Show Answer
  The correct answer is B .
• Question 26: A construction company is owned by two partners X and Y and it is agreed that their profit will be divided in the ratio 4:5. At the end of the year, Y received ₦5,000 more than X. What is the total profit of the company for the year? Options:
  A) ₦20, 000
  B) ₦25,000
  C) ₦30,000
  D) ₦15,000
  E) ₦45, 000
  Show Answer
  The correct answer is E .
• Question 27: Find the value of 110111₂ + 10100₂ Options:
  A) 1101011₂
  B) 1001001₂
  C) 1001011₂
  D) 1001111₂
  Show Answer
  The correct answer is C .
• Question 28:

  A cylinder pipe, made of metal is 3cm thick.If the internal radius of the pipe is 10cm.Find the volume of metal used in making 3m of the pipe.

  Options:
  A) 153$\pi$cm³
  B) 207$\pi$cm³
  C) 15 300$\pi$cm³
  D) 20 700$\pi$cm³
  Show Answer
  The correct answer is D .
• Question 29: Simplify $\frac{\sqrt{2}}{\sqrt{3}-\sqrt{2}}$ - $\frac{3-2}{\sqrt{3}+\sqrt{2}}$ Options:
  A) 2$\sqrt{2}-\sqrt{3}$
  B) 3($\sqrt{6}$ - 1)
  C) $\sqrt{6}$ - 3
  D) -$\frac{1}{2}$
  E) $\frac{-\sqrt{3}}{\sqrt{2}-\sqrt{2}}$
  Show Answer
  The correct answer is B .
• Question 30: In a family of 21 people, the average age is 14years. If the age of the grandfather is not counted, the average age drops to 12 years. What is the age of the grandfather? Options:
  A) 35 years
  B) 40 years
  C) 42 years
  D) 54 years
  Show Answer
  The correct answer is D .