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 1481: Rationalize the denominator of the given expression $\frac{\sqrt{1+a}-\sqrt{a}}{1+a+\sqrt{a}}$ Options:
  A) 1 + 2a - 2$\sqrt{a(1+a)}$
  B) $\sqrt{1(1+a)}$
  C) 2a - 2$\sqrt{a(1+a)}$
  D) 1 + 2a - 2$\sqrt{a+b}$
  Show Answer
  The correct answer is A .
• Question 1482: In $△$ XYZ, XY = 13cm, YZ = 9cm, XZ = 11cm and XYZ = $\theta$. Find cos$\theta$^o Options:
  A) $\frac{4}{39}$
  B) $\frac{43}{39}$
  C) $\frac{209}{3}$
  D) $\frac{43}{78}$
  Show Answer
  The correct answer is D .
• Question 1483: If the distance between the points (x, 3) and (-x, 2) is 5. Find x Options:
  A) 6.0
  B) 2.5
  C) $\sqrt{6}$
  D) $\sqrt{3}$
  Show Answer
  The correct answer is C .
• Question 1484: The formula Q = 1.5 + 0.5n gives the cost Q(in Naira)of feeding n people one additional person Options:
  A) 350k
  B) 200k
  C) 150k
  D) 50k
  Show Answer
  The correct answer is B .
• Question 1485:

  Evaluate $\frac{12.02\times 20.06}{26.04\times 60.06}$, correct to three significant figures.

  Options:
  A) 0.157
  B) 0.154
  C) 0.155
  D) 0.158
  Show Answer
  The correct answer is B .
• Question 1486: The size of a quantity first doubles and then increases by a further 16%. After a short time its size decreases by 16%. What is the net increases in size of the quantity? Options:
  A) $\frac{59300}{625}$
  B) $\frac{50900}{625}$
  C) 200%
  D) +100%
  Show Answer
  The correct answer is C .
• Question 1487: At what real value of x do the curves whose equations are y = x³ + x and y = x² + 1 intersect? Options:
  A) -2
  B) 2
  C) -1
  D) 9
  E) 1
  Show Answer
  The correct answer is E .
• Question 1488: The positive root of t in the following equation, 4t² + 7t - 1$\pi$ = 0, correct to 4 places of decimal, is Options:
  A) 1.0622
  B) 10.6225
  C) 0.1328
  D) 0.3218
  E) 2.0132
  Show Answer
  The correct answer is C .
• Question 1489: (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 1490:

  

  The diagram above is a circle with centre C. P, Q and S are points on the circumference. PS and SR are tangents to the circle. ∠PSR = 36${}^{\circ }$. Find ∠PQR

  Options:
  A) 72${}^{\circ }$
  B) 36${}^{\circ }$
  C) 144${}^{\circ }$
  D) 54${}^{\circ }$
  Show Answer
  The correct answer is A .