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 1531: If sinx^o = what is sin (90 - x)^o? Options:
  A) $\frac{\sqrt{b^2-a^2}}{b}$
  B) 1$\frac{-a}{b}$
  C) $\frac{b^2-a^2}{b}$
  D) $\frac{a^2-b^2}{b}$
  E) $\sqrt{b^2-a^3}$
  Show Answer
  The correct answer is A .
• Question 1532: Evaluate$\left(\begin{array}{cc}3& -2\\ -7& 5\end{array}\right)$ + 2$\left(\begin{array}{cc}-2& 4\\ 3& -1\end{array}\right)$ Options:
  A) $\left(\begin{array}{cc}-1& 6\\ -1& 3\end{array}\right)$
  B) $\left(\begin{array}{cc}3& 4\\ -2& 6\end{array}\right)$
  C) $\left(\begin{array}{cc}-1& 6\\ 1& 3\end{array}\right)$
  D) $\left(\begin{array}{cc}3& 4\\ 2& 6\end{array}\right)$
  Show Answer
  The correct answer is A .
• Question 1533:

  Measurements of the diameters, in centimeters, in centimeters, of 20 copper spheres are distributed as shown below:

  $\begin{array}{ccc}\text{Class boundary in cm}& \text{frequency}& \\ 3.35-3.45& 3\\ 3.45-3.55& 6\\ 3.55-3.65& 7\\ 3.65-3.75& 4\end{array}$

  What is the mean diameter of the copper spheres?

  Options:
  A) 3.40cm
  B) 3.58cm
  C) 3.56cm
  D) 3.62cm
  Show Answer
  The correct answer is C .
• Question 1534: Find the range of values of x for which 3x - 7 $\le$ 0 and x + 5 > 0
  Options:
  A) -5 < x < $\frac{7}{3}$
  B) -5 $\le$ x $\le$ $\frac{7}{3}$
  C) -5 < x $\le$ $\frac{7}{3}$
  D) -5 $\le$ x < $\frac{7}{3}$
  Show Answer
  The correct answer is C .
• Question 1535:

  Each of the interior angles of a regular polygon is 140°. Calculate the sum of all the interior angles of the polygon.

  Options:
  A) 1080°
  B) 1260°
  C) 2160°
  D) 1800°
  Show Answer
  The correct answer is B .
• Question 1536: 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 1537:

  A man sells different brands of an items. ${}^1{/}_9$ of the items he has in his shop are from Brand A, ${}^5{/}_8$ of the remainder are from Brand B and the rest are from Brand C. If the total number of Brand C items in the man's shop is 81, how many more Brand B items than Brand C does the shop has?

  Options:
  A) 243
  B) 108
  C) 54
  D) 135
  Show Answer
  The correct answer is C .
• Question 1538: 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 1539:

  List all integers satisfying the inequality in -2 < 2x-6 < 4

  Options:
  A) 2,3,4 and 5
  B) 2,3
  C) 2,5
  D) 3,4
  Show Answer
  The correct answer is D .
• Question 1540: Express 130 kilometers per second in meters per hour Options:
  A) 7.8 x 10^-5
  B) 648 x 10⁶
  C) 7,800,00
  D) 4.68 x 10^-8
  E) 780 x 10⁵
  Show Answer
  The correct answer is D .