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 271:

  

  The sketch is the curve of y = ax² + bx + c. Find a, b and c respectively

  Options:
  A) 1, 0, -4
  B) -2, 2, -4
  C) 0, 1, -4
  D) 2, -2, -4
  E) 2, -2, -4
  Show Answer
  The correct answer is A .
• Question 272: 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 273:

  $\begin{array}{cccccc}x& 1& 2& 3& 4& 5\\ f& 2& 1& 2& 1& 2\end{array}$

  Find the variance of the frequency distribution above

  Options:
  A) $\frac{3}{2}$
  B) $\frac{9}{4}$
  C) $\frac{5}{2}$
  D) 3
  Show Answer
  The correct answer is B .
• Question 274: A man walks 100 m due West from a point X to Y, he then walks 100 m due North to a point Z. Find the bearing of X from Z. Options:
  A) 195^o
  B) 135^o
  C) 225^o
  D) 045^o
  Show Answer
  The correct answer is B .
• Question 275: In a recent zonal championship games involving 10 teams, teams X and Y were given probabilities $\frac{2}{5}$ and $\frac{1}{3}$ respectively of winning the gold in the football event. What is the probability that either team will win the gold? Options:
  A) $\frac{2}{15}$
  B) $\frac{7}{15}$
  C) $\frac{11}{15}$
  D) $\frac{13}{15}$
  Show Answer
  The correct answer is C .
• Question 276: If | 2 3 | = | 4 1 |. find the value of y. 7 Options:
  A) -6
  B) 6
  C) -12
  D) 12
  Show Answer
  The correct answer is A .
• Question 277: Simplify $\frac{1}{x^2+5x+6}$ + $\frac{1}{x^2+3x+2}$ Options:
  A) $\frac{x}{(x+2)(x-3)}$
  B) $\frac{2}{(x+5)(x-3)}$
  C) $\frac{2}{(x+1)(x+3)}$
  D) $\frac{2}{(x-1)(x-3)}$
  Show Answer
  The correct answer is C .
• Question 278: Find the difference between the range and the variance of the following set of numbers 4, 9, 6, 3, 2, 8, 10, 5, 6, 7 where $\sum d^2$ = 60 Options:
  A) 2
  B) 3
  C) 4
  D) 6
  Show Answer
  The correct answer is A .
• Question 279: Find the probability that a number picked at random from the set(43, 44, 45, ..., 60) is a prime number. Options:
  A) $\frac{2}{3}$
  B) $\frac{1}{3}$
  C) $\frac{2}{9}$
  D) $\frac{7}{9}$
  Show Answer
  The correct answer is C .
• Question 280:

  Fifty boxes each of 50 bolts were inspected for the number which were defective. The following was the result:

  $\begin{array}{ccccccc}\text{No. defective per box}& 4& 5& 6& 7& 8& 9\\ \text{No. of boxes}& 2& 7& 17& 10& 8& 6\end{array}$

  The mean and the median of the distribution are respectively

  Options:
  A) 6.7, 6
  B) 7.6, 5
  C) 5.7, 87
  D) 34, 6
  Show Answer
  The correct answer is A .