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 651: If x + $\frac{1}{x}$ = 4, find x² + $\frac{1}{x^2}$ Options:
  A) 16
  B) 14
  C) 12
  D) 9
  Show Answer
  The correct answer is B .
• Question 652: What are K and L respectively if $\frac{1}{2}$(3y - 4x)² = (8x² + kxy + Ly²) Options:
  A) -12, $\frac{9}{2}$
  B) -6, 9
  C) 6, 9
  D) 12, $\frac{9}{2}$
  Show Answer
  The correct answer is A .
• Question 653: A binary operation ⊗ defined on the set of integers is such that m⊗n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0 Options:
  A) -⁵/₄
  B) -⁵/₆
  C) zero
  D) 5
  Show Answer
  The correct answer is A .
• Question 654:

  If S = (4t + 3)(t - 2), find ds/dt when t = 5 secs.

  Options:
  A) 50 units per sec
  B) 35 units per sec
  C) 22 units per sec
  D) 13 units per sec
  Show Answer
  The correct answer is B .
• Question 655: The chances of Usman and Dele passing a Mathematics test are 12 and 13 respectively. What is the probability that neither of them passes the test? Options:
  A) $\frac{3}{5}$
  B) $\frac{2}{5}$
  C) $\frac{4}{15}$
  D) $\frac{1}{5}$
  E) $\frac{2}{15}$
  Show Answer
  The correct answer is C .
• Question 656:

  

  The figure is a solid with the trapezium PQRS as its uniform cross-section. Find its volume

  Options:
  A) 120m²
  B) 576m³
  C) 816m³
  D) 1056m³
  Show Answer
  The correct answer is C .
• Question 657: Evaluate $\frac{6.3\times {10}^5}{81\times {10}^3}$ to 3 significant fiqures Options:
  A) 77.80
  B) 778.0
  C) 7.870
  D) 8.770
  E) 88.70
  Show Answer
  The correct answer is A .
• Question 658:

  

  The pie chart above shoes the distribution of the corps harvested from a farmland in a year, If 3,000 tonnes of millet is harvested, what amount of beans is harvested?

  Options:
  A) 9000 tonnes
  B) 6000 tonnes
  C) 1500 tonnes
  D) 1200tonnes
  Show Answer
  The correct answer is D .
• Question 659: Make r subject of the formula given that $\frac{x}{r+a}=\frac{a}{r}$ Options:
  A) $\frac{a^2}{(x-a)}$
  B) $\frac{a^2}{(x+a)}$
  C) $\frac{a}{x-a}$
  D) $\frac{a}{x+a}$
  Show Answer
  The correct answer is A .
• Question 660: Twenty girls and y boys sat on an examination. The mean marks obtained by the girls and boys were 52 and 57 respectively. if the total score for both girls and boys was 2950, find y. Options:
  A) 51
  B) 48
  C) 30
  D) 25
  E) 18
  Show Answer
  The correct answer is C .