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 1411: A binary operation * is defined on the set of positive integers is such x*y = 2x-3y+2 for all positive integers x and y. The binary operation is Options:
  A) commutative and close on the set of positive integers
  B) neither commutative nor closed on the set of ppositive integers
  C) commutative but not closed on the set of positive integers
  D) not cummutative but closed on the set of positive integers
  Show Answer
  The correct answer is B .
• Question 1412: 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 1413:

  

  The histogram above represents the weights of students who travelled out to their school for an examination. How many people made the trip.

  Options:
  A) 78
  B) 38
  C) 29
  D) 69
  Show Answer
  The correct answer is C .
• Question 1414:

  The difference between an exterior angle of (n - 1) sided regular polygon and an exterior angle of (n + 2) sided regular polygon is 6${}^o$, then the value of "n" is

  Options:
  A) 11
  B) 13
  C) 12
  D) 14
  Show Answer
  The correct answer is B .
• Question 1415:

  If (x - a) is a factor of bx - ax + x², find the other factor.

  Options:
  A) (x + b)
  B) (x - b)
  C) (a + b)
  D) (a - b)
  Show Answer
  The correct answer is A .
• Question 1416: Find the length of a side of a rhombus whose diagonals are 6cm and 8cm Options:
  A) 8cm
  B) 5cm
  C) 4cm
  D) 3cm
  Show Answer
  The correct answer is B .
• Question 1417: Solve for a positive number x such that 2(x³ - x² - 2x) = 1 Options:
  A) 4
  B) 3
  C) 2
  D) 1
  Show Answer
  The correct answer is C .
• Question 1418: Evaluate ${\int }_{\frac{-\pi }{2}}^{\frac{\pi }{2}}cosxdx$ Options:
  A) zero
  B) 1
  C) 2
  D) 3
  Show Answer
  The correct answer is C .
• Question 1419: The derivatives of (2x + 1)(3x + 1) is Options:
  A) 12x + 1
  B) 6x + 5
  C) 6x + 1
  D) 12x + 5
  Show Answer
  The correct answer is D .
• Question 1420: A man earns ₦3,500 per month out of which he spends 15% on his children's education. If he spends additional ₦1,950 on food, how much does he have left? Options:
  A) ₦525
  B) ₦1,025
  C) ₦1,950
  D) ₦2,975
  Show Answer
  The correct answer is B .