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 1151: a binary operation $\oplus$ o the set of rational numbers is defined as x $\oplus$ y = $\frac{x^2-y^2}{2xy}$. Find -5 $\oplus$ 3 Options:
  A) $\frac{8}{15}$
  B) -$\frac{17}{15}$
  C) $\frac{17}{15}$
  D) $\frac{8}{-15}$
  Show Answer
  The correct answer is D .
• Question 1152: The diameter of a metal rod is measured as 23.40 cm to four significant figures. What is the maximum error in the measurement? Options:
  A) 0.05cm
  B) 0.5cm
  C) 0.045cm
  D) 0.005cm
  E) 0.004cm
  Show Answer
  The correct answer is D .
• Question 1153:

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

  This table shows the frequency distribution of a data if the mean is $\frac{43}{14}$ find y

  Options:
  A) 1
  B) 2
  C) 3
  D) 4
  Show Answer
  The correct answer is B .
• Question 1154:

  

  In the diagram above are two concentric circles of radii r and R respectively with center O. If r = ²/₃R, express the area of the shaded portion in terms of π and R

  Options:
  A) ²¹/₂₅πR²
  B) ⁹/₂₅πR²
  C) ²¹/₂₃πR²
  D) ⁵/₉πR²
  Show Answer
  The correct answer is D .
• Question 1155:

  Let a binary operation '*' be defined on a set A. The operation will be commutative if

  Options:
  A) a*b = b*a
  B) (a*b)*c = a*(b*c)
  C) (b ο c)*a = (b*a) ο (c*a)
  D) None of the above
  Show Answer
  The correct answer is A .
• Question 1156:

  

  In the diagram above ∠OPQ is

  Options:
  A) 90${}^{\circ }$
  B) 53${}^{\circ }$
  C) 36${}^{\circ }$
  D) 26${}^{\circ }$
  Show Answer
  The correct answer is B .
• Question 1157: What is the different between 0.007685 correct to three significant figures and 0.007685 correct to four places of decimal? Options:
  A) 10^-5
  B) 7 x 10^-4
  C) 8 x 10^-5
  D) 10^-6
  Show Answer
  The correct answer is A .
• Question 1158: The angle of depression of a boat from the top of a cliff 10m high is 30. How far is the boat from the foot of the cliff? Options:
  A) $\frac{5\surd 3m}{3}$
  B) 5√3m
  C) 10√3m
  D) $\frac{10\surd 3m}{3}$
  Show Answer
  The correct answer is C .
• Question 1159: Factorize complete;y (4x+3y)² - (3x-2y)² Options:
  A) (x+5y)(7x+y)
  B) (x+5y)(7x-y)
  C) (x-5y)(7x+y)
  D) (x-5y)(7x-y)
  Show Answer
  The correct answer is A .
• Question 1160: Simplify 2.04 × 3.7 (Leave your answer in 2 decimal place) Options:
  A) 7.51
  B) 7.71
  C) 5.5
  D) 7.55
  Show Answer
  The correct answer is D .