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 671:

  Express 495g as a percentage of 16.5kg

  Options:
  A) 3%
  B) 3 $\frac{1}{3}$%
  C) 15%
  D) 30%
  Show Answer
  The correct answer is A .
• Question 672: The quantity (x + y) is a factor of Options:
  A) x² + y²
  B) x³ - y³
  C) 2x² - 3xy + y² - x + 1
  D) 2x³ + 2x²y - xy + 3x - y² + 3y
  E) x⁵ - y⁵
  Show Answer
  The correct answer is D .
• Question 673:
  

  If in the diagram above, FG is parallel to KM, find the value of x

  Options:
  A) 75^o
  B) 95^o
  C) 105^o
  D) 125^o
  Show Answer
  The correct answer is B .
• Question 674: Find the value of ${\int }_0^{\pi }\frac{co{s}^2\theta -1}{si{n}^2\theta }d\theta$ Options:
  A) π
  B) π/2
  C) -π/2
  D) -π
  Show Answer
  The correct answer is D .
• Question 675:
  

  Calculate, correct to three significant figures, the length of the arc AB in the diagram above.
  [Take $\pi {=}^{22}{/}_7$]

  Options:
  A) 32.4 cm
  B) 30.6 cm
  C) 28.8 cm
  D) 30.5 cm
  Show Answer
  The correct answer is B .
• Question 676: Simplify 5$\sqrt{18}$ - 3$\sqrt{72}$ + 4$\sqrt{50}$ Options:
  A) 17$\sqrt{4}$
  B) 4$\sqrt{17}$
  C) 17$\sqrt{2}$
  D) 12$\sqrt{4}$
  Show Answer
  The correct answer is C .
• Question 677: 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 678: 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 679: The weights of 30 new-born babies are given as follows: 6, 9, 5, 7, 6, 7, 5, 8, 9, 5, 7, 5, 8, 7, 8, 7, 5, 6, 5, 7, 6, 9, 9, 7, 8, 8, 7, 8, 9, 8. The mode is Options:
  A) 6
  B) 5
  C) 8
  D) 7
  E) 10
  Show Answer
  The correct answer is D .
• Question 680:

  Find the value of x for which the function 3x³ - 9x² is minimum

  Options:
  A) zero
  B) 2
  C) 3
  D) 5
  Show Answer
  The correct answer is B .