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 1911: The variance of x, 2x, 3x, 4x and 5x is Options:
  A) x√2
  B) 2x²
  C) x²
  D) 3x
  Show Answer
  The correct answer is B .
• Question 1912: The solution of the quadratic equation px² + qx + b = 0 is Options:
  A) $\sqrt{\frac{-b\pm b^2-4ac}{2a}}$
  B) $\frac{-b\pm \sqrt{p^2-4pb}}{2a}$
  C) $\frac{-q\pm \sqrt{q^2-4bp}}{2p}$
  D) $\frac{-q\pm \sqrt{p^2-4bp}}{2p}$
  Show Answer
  The correct answer is C .
• Question 1913: Construct a quadratic equation whose roots are -$\frac{3}{2}$ and 7 Options:
  A) 3x² + 11x + 21 = 0
  B) 2x² + 11x + 21 = 0
  C) 2x² - 11x – 21 = 0
  D) 3x² - 11x - 21 = 0
  E) x² - 11x – 21 = 0
  Show Answer
  The correct answer is C .
• Question 1914: Factorize completely x²+2xy + y²+3x + 3y - 18 Options:
  A) (x+y+6)(x+y-3)
  B) (x-y-6)(x-y+3)
  C) (x-y+6)(x-y-3)
  D) (x+y-6)(x+y+3)
  Show Answer
  The correct answer is A .
• Question 1915: What is the area between two concentric circles of diameters 26cm and 20cm? Options:
  A) 100$\pi$
  B) 169$\pi$
  C) 69$\pi$
  D) 9$\pi$
  E) 269$\pi$
  Show Answer
  The correct answer is C .
• Question 1916: Find the standard derivation of the following data -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5 Options:
  A) 2
  B) 3
  C) $\sqrt{10}$
  D) $\sqrt{11}$
  Show Answer
  The correct answer is C .
• Question 1917:

  The angle of a sector of a circle radius 10.5 cm is 48${}^o$. Calculate the perimeter of the sector.

  Options:
  A) 25.4cm
  B) 25.4cm
  C) 25.6cm
  D) 29.8cm
  Show Answer
  The correct answer is D .
• Question 1918: If x > 0, find the range of the numbers x - 3, 3x + 2, x - 1, 4x, 2x - 1, x - 2, 2x - 2, 3x and 3x + 1 Options:
  A) 3x + 3
  B) 3x + 1
  C) 2x + 5
  D) 2x + 1
  Show Answer
  The correct answer is B .
• Question 1919:

  No. of days	1	2	3	4	5	6
  No. of students	20	x	50	40	2x	60

  The distribution above shows the number of days a group of 260 students were absents from school in a particular term. How many students were absent for at least four days in the term

  Options:
  A) 210
  B) 40
  C) 120
  D) 160
  Show Answer
  The correct answer is D .
• Question 1920: Simplify $\frac{3^{-5n}}{9^{1-n}}\times {27}^{n+1}$ Options:
  A) 3²
  B) 3³
  C) 3⁵
  D) 3
  Show Answer
  The correct answer is D .