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 1551: A sector of angle 120° is cut out from a circle of radius 13.5cm. what area of the circle is remaining ? (π = $\frac{22}{7}$) Options:
  A) 14.1cm²
  B) 95.5cm²
  C) 190.9cm²
  D) 381.9cm²
  E) 763.7cm²
  Show Answer
  The correct answer is D .
• Question 1552: Find the area of the figure bounded by the given pair of curves y = x² - x + 3 and y = 3 Options:
  A) 17/6 units (sq)
  B) 7/6 units (sq)
  C) 5/6 units (sq)
  D) 1/6 units (sq)
  Show Answer
  The correct answer is A .
• Question 1553: The ratio of the base area of a hollow cone to that of its curved surface is 1:4. If its base radius is 7cm, calculate the slant height of the cone Options:
  A) 7cm
  B) 22cm
  C) 28cm
  D) 49cm
  E) 154cm
  Show Answer
  The correct answer is C .
• Question 1554: If s = (2 + 3t)(5t - 4), find $\frac{dy}{dx}$ when t = $\frac{4}{5}$ sec Options:
  A) 0 units per sec.
  B) 15 units per seconds
  C) 22 units per seconds
  D) 26 units per seconds
  Show Answer
  The correct answer is C .
• Question 1555: Find the value of $\frac{tan{60}^o-tan{30}^o}{tan{60}^o+tan{30}^o}$ Options:
  A) $\frac{4}{\sqrt{3}}$
  B) $\frac{2}{\sqrt{3}}$
  C) 1
  D) $\frac{1}{2}$
  Show Answer
  The correct answer is D .
• Question 1556:

  Simplify $\frac{324-4x^2}{2x+18}$

  Options:
  A) 2(x - 9)
  B) 2(9 + x)
  C) 81 - x${}^2$
  D) -2(x - 9)
  Show Answer
  The correct answer is D .
• Question 1557: 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 .
• Question 1558: The variance of the scores 1, 2, 3, 4, 5 is Options:
  A) 1.25
  B) 1.40
  C) 2.05
  D) 3.00
  Show Answer
  The correct answer is C .
• Question 1559:

  Find the length of a chord 3cm from the centre of a circle of radius 5cm

  Options:
  A) 8cm
  B) 5.6cm
  C) 7cm
  D) 6.5cm
  Show Answer
  The correct answer is A .
• Question 1560:

  

  The table above shows that the scores of a group of students in a test. If the average score is 3.5, find the value of x

  Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is B .