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 641: Solve the system of equation 2^{x + y} = 32, 3^{3y - x} = 27 Options:
  A) (3, 2)
  B) (-3, 2)
  C) (3, -2)
  D) (-3, -2)
  E) (2, 2)
  Show Answer
  The correct answer is A .
• Question 642:

  Solve the inequality: -7 $\le$ 9 - 8x < 16 - x

  Options:
  A) -1 $\le$ x $\le$ 2
  B) -1 $\le$ x < 2
  C) -1 < x < 2
  D) -1 < x $\le$ 2
  Show Answer
  The correct answer is D .
• Question 643: Solve the simultaneous equations for x in x² + y - 8 = 0, y + 5x - 2 = 0 Options:
  A) -28, 7
  B) 6, -28
  C) 6, -1
  D) -1, 7
  E) 3, 2
  Show Answer
  The correct answer is C .
• Question 644:

  Find the missing numerator $\frac{5}{x+1}$ - $\frac{3}{1-x}$ - $\frac{7x-1}{x^2-1}$ = x + 1

  Options:
  A) -1
  B) x - 1
  C) $\frac{3(1-5x)}{x-1}$
  D) $\frac{1}{(x+1)}$
  E) 3(1 - 5x)
  Show Answer
  The correct answer is D .
• Question 645:

  $\begin{array}{ccccc}\oplus mod10& 2& 4& 6& 8\\ 2& 4& 8& 2& 6\\ 4& 8& 6& 4& 2\\ 4& 8& 6& 4& 2\\ 6& 2& 4& 6& 8\\ 8& 6& 2& 8& 4\end{array}$

  The multiplication table above has modulo 10 on the set S = (2, 4, 6, 8). Find the inverse of 2

  Options:
  A) 2
  B) 4
  C) 6
  D) 8
  Show Answer
  The correct answer is A .
• Question 646:

  

  If the diagram is the graph of y = x², the shaded area is

  Options:
  A) 64 square units
  B) $\frac{126}{4}$ square units
  C) 32 square units
  D) $\frac{64}{3}$ square units
  Show Answer
  The correct answer is D .
• Question 647:

  Inpreparing rice cutlets, a cook used 75g of rice, 40g of margarine, 105g of meat and 20g of bread crumbs. Find the angle of the sector which represent meat in a pie chart?

  Options:
  A) 30${}^o$
  B) 60${}^o$
  C) 112.5${}^o$
  D) 157.5${}^o$
  Show Answer
  The correct answer is D .
• Question 648: A polynomial in x whose roots are $\frac{4}{3}$ and -$\frac{2}{5}$ is Options:
  A) 15x² - 11x - 12
  B) 15x² + 11x - 12
  C) 12x² - x - 12
  D) 12x² + 11x - 15
  Show Answer
  The correct answer is A .
• Question 649:

  

  In the figure, PQ is parallel to SQ ; QS bisets < PSQ, < PQS is 65${}^{\circ }$ and < RPS is 20${}^{\circ }$. What is the size of < PRS?

  Options:
  A) 45${}^{\circ }$
  B) 35${}^{\circ }$
  C) 40${}^{\circ }$
  D) 30${}^{\circ }$
  E) 42${}^{\circ }$
  Show Answer
  The correct answer is D .
• Question 650: ($\frac{x^a}{x^b}$)^{a + b} by ($\frac{x^{a+b}}{x^{a-b}}$)^{$\frac{a^2}{b}$} Options:
  A) x^-a2
  B) x^b2
  C) x^{a2 - b2}
  D) $\frac{1}{x^{a2+b2}}$
  E) x^{b2 - a2}
  Show Answer
  The correct answer is D .