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 1391:

  Marks	1	2	3	4	5
  Frequency	2	2	8	4	4

  The table above show the marks obtained in a given test.

  Find the mean mark

  Options:
  A) 3.1
  B) 3.0
  C) 3.2
  D) 3.3
  Show Answer
  The correct answer is D .
• Question 1392: If x > 0, find the range of number x-3, 3x+2,x-1, 4x, 2x-1, x-2, 2x-2, 3x and 3x+1 Options:
  A) 3x+3
  B) 3x+1
  C) 2x+5
  D) 2x+1
  Show Answer
  The correct answer is C .
• Question 1393:

  Solve for k in the equation ${\frac{1}{8}}^{k+2}$ = 1

  Options:
  A) 2
  B) -4
  C) -2
  D) 4
  Show Answer
  The correct answer is C .
• Question 1394: (3.2)² - (1.8)² equals Options:
  A) 7.0
  B) 2.56
  C) 13.48
  D) 2.0
  E) 0.07
  Show Answer
  The correct answer is A .
• Question 1395: The vectors a and b are given in terms of two perpendicular units vectors i and j on a plane by a = 2i - 3j, b = -i + 2j. Find the magnitude of the vector a + 3b Options:
  A) 2
  B) 4
  C) $\sqrt{10}$
  D) 35
  E) 2.2
  Show Answer
  The correct answer is C .
• Question 1396:

  The angle of a sector of a circle radius 10.5 cm is 48${}^o$. Calculate the perimeter of the sector.

  Options:
  A) 25.4cm
  B) 25.4cm
  C) 25.6cm
  D) 29.8cm
  Show Answer
  The correct answer is D .
• Question 1397: 3% of a family's income is spent on electricity, 58% on food, 20% on transport, 11% on education and 7% on extended family. The angles subtended at the centre of the pie chart under education and food are respectively Options:
  A) 76.8^o and 25.2^o
  B) 10.8^o and 224.6^o
  C) 112.4^o and 72.0^o
  D) 39.6^o and 212.4^o
  Show Answer
  The correct answer is D .
• Question 1398: Find the mean deviation of 20, 25, 21, 27, 28, 29, to the nearest whole number Options:
  A) 2
  B) 3
  C) 4
  D) 5
  E) 6
  Show Answer
  The correct answer is B .
• Question 1399: If P = $\sqrt{\frac{r{s}^3}{t}}$, express r in terms of p, s and t. Options:
  A) $\frac{p^{2}t}{s^3}$
  B) $\frac{p^{3}t}{s^3}$
  C) $\frac{p^{3}t}{s^2}$
  D) $\frac{pt}{s^3}$
  Show Answer
  The correct answer is A .
• Question 1400: Differentiate sin x - x cos x Options:
  A) x cos x
  B) x sin x
  C) -x cos x
  D) -x sin x
  Show Answer
  The correct answer is B .