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 1501: A binary operation * on the set of rational numbers is defined as $x\times y=\frac{x^2-y^2}{2xy}find-5\times 3$ Options:
  A) $\frac{-8}{15}$
  B) $\frac{8}{15}$
  C) $\frac{17}{15}$
  D) $\frac{-17}{15}$
  Show Answer
  The correct answer is A .
• Question 1502:

  Given:

  U = {Even numbers between 0 and 30}

  P = {Multiples of 6 between 0 and 30}

  Q = {Multiples of 4 between 0 and 30}

  Find (P∪Q)^c

  Options:
  A) {2, 10, 14, 22, 26}
  B) {0, 10, 14, 22, 26}
  C) {2,4, 14, 18, 26}
  D) {0, 2, 6, 22, 26}
  Show Answer
  The correct answer is A .
• Question 1503: Two fair dice are rolled. What is the probability that both show up the same number of points. Options:
  A) $\frac{1}{36}$
  B) $\frac{7}{36}$
  C) $\frac{1}{2}$
  D) $\frac{1}{6}$
  E) $\frac{1}{6}$
  Show Answer
  The correct answer is E .
• Question 1504:

  Calculate 243${}_{six}$ – 243${}_{five}$ expressing your answer in base 10.

  Options:
  A) 1
  B) 26
  C) 46
  D) 0
  Show Answer
  The correct answer is C .
• Question 1505: The sum of the interior angles of a polygon is a given as 1080^o. Find the number of the sides of the polygon. Options:
  A) 5
  B) 7
  C) 6
  D) 8
  Show Answer
  The correct answer is D .
• Question 1506: x varies directly as y and inversely as z. when x = 5, y = 2 and z = 1. What is the value of x when y = 5 and z = 2? Options:
  A) 2.5
  B) 5
  C) 6.25
  D) 6.52
  E) 7.5
  Show Answer
  The correct answer is C .
• Question 1507:

  Find the variance of the numbers k, k+1, k+2.

  Options:
  A) $\frac{2}{3}$
  B) 1
  C) k + 1
  D) (k + 1)²
  Show Answer
  The correct answer is A .
• Question 1508: The ratio of the base area of a hollow cone to that of its curved surface is 1:4. If its base radius is 7cm, calculate the slant height of the cone Options:
  A) 7cm
  B) 22cm
  C) 28cm
  D) 49cm
  E) 154cm
  Show Answer
  The correct answer is C .
• Question 1509:

  

  In the figure, find angle x

  Options:
  A) 100${}^{\circ }$
  B) 120${}^{\circ }$
  C) 60${}^{\circ }$
  D) 110${}^{\circ }$
  E) 140${}^{\circ }$
  Show Answer
  The correct answer is E .
• Question 1510:

  The ages of students in a small primary school were recorded in the table below.

  Age	5-6	7-8	9-10
  Frequency	29	40	38

  
  Estimate the median.

  Options:
  A) 7.725
  B) 6.225
  C) 7.5
  D) 6.5
  Show Answer
  The correct answer is A .