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 1871:

  The kinetic element with respect to the multiplication shown in the diagram below is

  $\begin{array}{ccccc}\oplus & p& p& r& s\\ p& r& p& r& p\\ q& p& q& r& s\\ r& r& r& r& r\\ s& q& s& r& q\end{array}$

  Options:
  A) p
  B) q
  C) r
  D) s
  Show Answer
  The correct answer is D .
• Question 1872: Solve for the equation $\sqrt{x}$ - $\sqrt{(x-2)}$ - 1 = 0 Options:
  A) $\frac{3}{2}$
  B) $\frac{2}{3}$
  C) $\frac{4}{9}$
  D) $\frac{9}{4}$
  Show Answer
  The correct answer is D .
• Question 1873: A chord is drawn 12cm away from the centre of a circle of radius 13cm. What is the length of the chord? Options:
  A) 169.00 cm
  B) 144.00 cm
  C) 25.00 cm
  D) 17.69 cm
  E) 10.00 cm
  Show Answer
  The correct answer is E .
• Question 1874: If the function f(fx) = x³ + 2x² + qx - 6 is divisible by x + 1, find q Options:
  A) -5
  B) -2
  C) 2
  D) 5
  Show Answer
  The correct answer is A .
• Question 1875: If 9^{(x - $\frac{1}{2}$)} 3x² Options:
  A) $\frac{1}{2}$
  B) 1
  C) 2
  D) 3
  Show Answer
  The correct answer is B .
• Question 1876: If t varies inversely as the cube of s, and t = 24, when s = 3, find t when s = 2 Options:
  A) 8
  B) 24
  C) 27
  D) 81
  E) 648
  Show Answer
  The correct answer is D .
• Question 1877:

  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 .
• Question 1878: Rationalize $\frac{\sqrt{6}-\sqrt{4}}{\sqrt{6}+\sqrt{4}}$ Options:
  A) 5 + 2 $\sqrt{6}$
  B) 5 - 4 $\sqrt{6}$
  C) 5 + 4 $\sqrt{6}$
  D) 5 - 2 $\sqrt{6}$
  Show Answer
  The correct answer is D .
• Question 1879: If x and y represent the mean and the median respectively of the following set of numbers 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, find the $\frac{x}{y}$ correct to one decimal place Options:
  A) 18
  B) 15
  C) 1.0
  D) 5
  Show Answer
  The correct answer is C .
• Question 1880: Find the mean deviation of 20, 25, 21, 27, 28, 29, to the nearest whole number Options:
  A) 2
  B) 3
  C) 4
  D) 5
  E) 6
  Show Answer
  The correct answer is B .