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 1421: 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 1422: Convert 3.1415926 to 5 decimal places Options:
  A) 3.14160
  B) 3.14159
  C) 0.31415
  D) 3.14200
  Show Answer
  The correct answer is B .
• Question 1423: The mean of ten positive numbers is 16. When another number is added, the mean becomes 18. Find the eleventh number Options:
  A) 3
  B) 16
  C) 18
  D) 38
  Show Answer
  The correct answer is D .
• Question 1424:

  

  In the figure above, TS//XY and XY = TY, <STZ = 34${}^{\circ }$, < TXY = 47${}^{\circ }$. Find the angle marked n.

  Options:
  A) 47${}^{\circ }$
  B) 52${}^{\circ }$
  C) 56${}^{\circ }$
  D) 99${}^{\circ }$
  Show Answer
  The correct answer is B .
• Question 1425: Factorize completely y³ -4xy + xy³ - 4y Options:
  A) (y + ay)(y + 2)(y - 2)
  B) (y - xy)(y - 2)
  C) y(1 + x)(y + 2)(y -2)
  D) y(1 - x)(y + 2)(y - 2)
  Show Answer
  The correct answer is C .
• Question 1426:

  Find the probability that a number selected at random from 41 to 56 is a multipleof 9

  Options:
  A) $\frac{1}{8}$
  B) $\frac{2}{15}$
  C) $\frac{3}{16}$
  D) $\frac{7}{8}$
  Show Answer
  The correct answer is A .
• Question 1427:

  $\begin{array}{ccccccc}\text{No. of days}& 1& 2& 3& 4& 5& 6\\ \text{No. of students}& 20& 2x& 60& 40& x& 50\end{array}$

  The distribution above shows the number of days a group of 260 students were absent from school in a particular term. How many students were absent for at least four days in the term

  Options:
  A) 180
  B) 120
  C) 110
  D) 40
  Show Answer
  The correct answer is B .
• Question 1428: The mean of a set of six numbers is 60. If the mean of the first five is 50, find the sixth number in the set. Options:
  A) 105
  B) 100
  C) 95
  D) 110
  Show Answer
  The correct answer is D .
• Question 1429:

  Reach each number to two significant figures and then evaluate $\frac{0.02174\times 1.2047}{0.023789}$

  Options:
  A) 0
  B) 0.9
  C) 1.1
  D) 1.2
  Show Answer
  The correct answer is C .
• Question 1430: Which of the following is a factor of rs + tr - pt - ps? Options:
  A) (p - s)
  B) (s - p)
  C) r - p)
  D) r + p)
  Show Answer
  The correct answer is C .