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 1851: A binary operation θ defined on the set of real number is such that xθy = xy/6 for all x, y ∈ R. Find the inverse of 20 under this operation when the identity element is 6 Options:
  A) ¹/₁₂
  B) ¹⁰/₃
  C) ¹/₂₀
  D) ⁹/₅
  Show Answer
  The correct answer is D .
• Question 1852:

  

  In the diagram above, PST is a straight line, PQ = QS = RS. If ∠RST = 72${}^{\circ }$, find x

  Options:
  A) 36${}^{\circ }$
  B) 18${}^{\circ }$
  C) 72${}^{\circ }$
  D) 24${}^{\circ }$
  Show Answer
  The correct answer is D .
• Question 1853:

  

  If the area of $△$PQR above is 12$\sqrt{3}$cm², find the value of q?

  Options:
  A) 7cm
  B) 8cm
  C) 5cm
  D) 6cm
  Show Answer
  The correct answer is D .
• Question 1854: If x, y can take values from the set (1, 2, 3, 4), find the probability that the product of x and y is not greater than 6 Options:
  A) $\frac{5}{8}$
  B) $\frac{5}{16}$
  C) $\frac{1}{2}$
  D) $\frac{3}{8}$
  Show Answer
  The correct answer is A .
• Question 1855:

  The number of goals scored by a football team in 20 matches is shown below:

  $\begin{array}{ccccccc}\text{No. of goals}& 0& 1& 2& 3& 4& 5\\ \text{No. of matches}& 3& 5& 7& 3& 1& 0\end{array}$

  What are the values of the mean and the mode respectively?

  Options:
  A) (1.75, 5)
  B) (1.75, 2)
  C) (1.75, 1)
  D) (65, 74)
  Show Answer
  The correct answer is B .
• Question 1856: Calculate the area of a parallelogram whose diagonals are of length 8cm and 12cm and intersect at an angle of 135° Options:
  A) 271.5cm²
  B) 135.8cm²
  C) 96.0cm²
  D) 48.0cm²
  E) 33.9cm²
  Show Answer
  The correct answer is E .
• Question 1857: A sector of angle 120° is cut out from a circle of radius 13.5cm. what area of the circle is remaining ? (π = $\frac{22}{7}$) Options:
  A) 14.1cm²
  B) 95.5cm²
  C) 190.9cm²
  D) 381.9cm²
  E) 763.7cm²
  Show Answer
  The correct answer is D .
• Question 1858:
  

  From the diagram above. Find the fraction of the shaded position?

  Options:
  A) $\frac{1}{3}$
  B) $\frac{1}{5}$
  C) $\frac{1}{4}$
  D) $\frac{1}{6}$
  Show Answer
  The correct answer is D .
• Question 1859: ($\sqrt{2}+4\sqrt{2}$) ($\sqrt{3}+\sqrt{2}$) ($\sqrt{3}+\sqrt{2}$) is equal to Options:
  A) 1
  B) ($\sqrt{2}+4\sqrt{2}$)
  C) (6$\sqrt{2}$
  D) 8
  Show Answer
  The correct answer is A .
• Question 1860: Calculate the area of a parallelogram whose diagonals are of length 8cm and 12cm and intersect at an angle of 135° Options:
  A) 271.5cm²
  B) 135.8cm²
  C) 96.0cm²
  D) 48.0cm²
  E) 33.9cm²
  Show Answer
  The correct answer is E .