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 951:

  A binary operation $plus$ defined on the set of integers is such that m $plus$ n = n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0.

  Options:
  A) $\frac{-5}{4}$
  B) $\frac{-5}{6}$
  C) 0
  D) 5
  Show Answer
  The correct answer is D .
• Question 952: An operation * is defined on the set of real numbers by a*b = a + b + 1. If the identity elements is -1, find the inverse of the element 2 under *. Options:
  A) 4
  B) zero
  C) -2
  D) -4
  Show Answer
  The correct answer is D .
• Question 953: Evaluate ∫2(2x-3)^2/3dx Options:
  A) 3/5(2x-3)^5/3 + k
  B) 6/5(2x-3)^5/3 + k
  C) 2x-3+k
  D) 2(2x-3)+k
  Show Answer
  The correct answer is A .
• Question 954: Find the positive value of x if the standard deviation of the numbers 1, x + 1 is 6 Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is C .
• Question 955:

  Two numbers are respectively 35% and 80% more than a third number. The ratio of the two numbers is

  Options:
  A) 7 : 16
  B) 3 : 4
  C) 16 : 7
  D) 4 : 3
  Show Answer
  The correct answer is B .
• Question 956:

  

  In the diagram, POS and ROT are straight lines, OPQR is a parallelogram. |OS| = |OT| and ∠OST = 50^o. Calculate ∠OPQ.

  Options:
  A) 160^o
  B) 140^o
  C) 120^o
  D) 100^o
  Show Answer
  The correct answer is D .
• Question 957: How many sides has a regular polygon whose interior angle is 135^o Options:
  A) 12
  B) 10
  C) 9
  D) 8
  Show Answer
  The correct answer is D .
• Question 958: In a geometric progression, the first term is 153 and the sixth term is $\frac{17}{27}$. The sum of the first four terms is Options:
  A) $\frac{860}{3}$
  B) $\frac{680}{3}$
  C) $\frac{608}{3}$
  D) $\frac{680}{3}$
  Show Answer
  The correct answer is B .
• Question 959:

  In triangle FGB, < G = 90°, < H = 60°, while in triangle XYZ, < X = 60° and < Y = 30°. Form XYZ write down the ratio equal to $\frac{FG}{FH}$

  Options:
  A) $\frac{YX}{ZX}$
  B) $\frac{YX}{YZ}$
  C) $\frac{ZX}{YZ}$
  D) $\frac{YZ}{XY}$
  Show Answer
  The correct answer is D .
• Question 960:

  The pie chart shows the monthly expenditure of a public servant. The monthly expenditure on housing is twice that of school fees. How much does the worker spend on housing if his monthly income is ₦7200?

  Options:
  A) ₦1000
  B) ₦2000
  C) ₦3000
  D) ₦4000
  Show Answer
  The correct answer is B .