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 1451: The binary operation on the set of real numbers is defined by m*n = $\frac{mn}{2}$ for all m, n $\in$ R. If the identity element is 2, find the inverse of -5 Options:
  A) $-\frac{4}{5}$
  B) $-\frac{2}{5}$
  C) 4
  D) 5
  Show Answer
  The correct answer is A .
• Question 1452: The ninary operation * is defined on the set of integers p and q by p*q = pq + p + q. Find 2 * (3 * 4). Options:
  A) 59
  B) 19
  C) 67
  D) 38
  Show Answer
  The correct answer is A .
• Question 1453: The quantity y is partly constant and partly varies inversely as the square of x. With P and Q as constants, a possible relationship between x and y is Options:
  A) y = Q + $\frac{P}{x^2}$
  B) y = Q + px
  C) y = $\frac{PQ}{x^2}$
  D) y = Q - $\frac{P}{x^2}$
  Show Answer
  The correct answer is A .
• Question 1454:

  

  Calculate the volume of the regular three-dimensional figure drawn above, where <ABC = 90° (a right-angled triangle).

  Options:
  A) 394 cm${}^3$
  B) 425 cm${}^3$
  C) 268 cm${}^3$
  D) 540 cm${}^3$
  Show Answer
  The correct answer is D .
• Question 1455: If the 6th term of an arithmetic progression is 11 and the first term is 1, find the common difference. Options:
  A) $\frac{12}{5}$
  B) $\frac{5}{3}$
  C) -2
  D) 2
  Show Answer
  The correct answer is D .
• Question 1456: In a regular polygon, each interior angle doubles its corresponding exterior angle. Find the number of sides of the polygon. Options:
  A) 8
  B) 6
  C) 4
  D) 3
  Show Answer
  The correct answer is B .
• Question 1457: If 2log₃ y + log₃ x² = 4, then y is Options:
  A) 4 - log₃
  B) $\frac{4}{lo{g}_{3}x}$
  C) $\frac{4}{x}$
  D) $\pm$ $\frac{9}{x}$
  Show Answer
  The correct answer is D .
• Question 1458: The cost of production of an article is made up as follows: Labour ₦70, Power ₦15, Materials ₦30, Miscellaneous ₦5. Find the angle of the sector representing Labour in a pie chart Options:
  A) 210^o
  B) 105^o
  C) 105^o
  D) 175^o
  E) 90^o
  Show Answer
  The correct answer is A .
• Question 1459: Solve the following simultaneous equation for x. x² + y - 5 = 0, y - 7x + 3 = 0 Options:
  A) -2, 4
  B) 2, 4
  C) -1,8
  D) 1, -8
  Show Answer
  The correct answer is D .
• Question 1460: Find the angle subtended at the center of a circle by a chord which is equal in length to the radius of the circle. Options:
  A) 30${}^{\circ }$
  B) 45${}^{\circ }$
  C) 60${}^{\circ }$
  D) 90${}^{\circ }$
  Show Answer
  The correct answer is C .