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 411:

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

  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 412: Simplify T = $\frac{4R_2}{R_1^{-1}+R_2^{-1}+4R_3^{-1}}$ Options:
  A) $\frac{4R_1\times R_2{R}_3}{R_2{R}_3+R_1{R}_3+4R_1{R}_2}$
  B) $\frac{R_1{R}_2{R}_3}{R_2{R}_3+R_1{R}_2+4R_1{R}_2}$
  C) $\frac{16R_1{R}_2{R}_3}{R_2{R}_3+R_1{R}_2+R_1{R}_2}$
  D) $\frac{4R_1{R}_2{R}_3}{4R_2{R}_3+R_1{R}_2+4R_1{R}_2}$
  Show Answer
  The correct answer is A .
• Question 413: If x and y represent the mean and the median respectively of the following set of numbers 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, find the $\frac{x}{y}$ correct to one decimal place Options:
  A) 18
  B) 15
  C) 1.0
  D) 5
  Show Answer
  The correct answer is C .
• Question 414: Multiply (x² - 3x + 1) by (x - a) Options:
  A) x³ - (3 + a) x² + (1 + 3a)x - a
  B) x³ - (3 - a)x² + 3ax - a
  C) x³ - (3 - a)x² - (1 = 3a) - a
  D) x³ + (3 - a)x² + (1 + 3a) - a
  Show Answer
  The correct answer is A .
• Question 415: Simplify $\frac{\sqrt{1+x}+\sqrt{x}}{\sqrt{1+x}-\sqrt{x}}$ Options:
  A) -2x - 2$\sqrt{x(1+x)}$
  B) 1 + 2x + 2$\sqrt{x(1+x)}$
  C) $\sqrt{x(1+x)}$
  D) 1 + 2x - 2$\sqrt{x(1+x)}$
  Show Answer
  The correct answer is B .
• Question 416:

  The extension of a stretched string is directly proportional to its tension. If the extension produced by a tension of 8 Newtons is 2cm, find the extension produced by a tension of 12 Newtons.

  Options:
  A) 2
  B) 1
  C) 0
  D) 3
  Show Answer
  The correct answer is D .
• Question 417: What is the next number in the series 2, 1, $\frac{1}{2}$, $\frac{1}{4}$... Options:
  A) $\frac{1}{3}$
  B) $\frac{2}{8}$
  C) $\frac{3}{7}$
  D) $\frac{1}{8}$
  Show Answer
  The correct answer is D .
• Question 418: If two smaller sides of a right angled triangle are 4cm and 5cm, find its area Options:
  A) 10 cm²
  B) 6 cm²
  C) 24 cm²
  D) 8 cm²
  Show Answer
  The correct answer is A .
• Question 419: A trader goes to Ghana for y days with y cedis. For the first x days, he spends X cedis per day. The amount he has to spend per day for the rest of his stay is Options:
  A) $\frac{y(y-x)}{y-x}$ cedis
  B) $\frac{Yy-Xx)}{y-x}$ cedis
  C) $\frac{Y-Xy)}{y-x}$ cedis
  D) $\frac{Y-X}{y-x}$ cedis
  E) $\frac{Y-Xx}{y-x}$ cedis
  Show Answer
  The correct answer is E .
• Question 420: If U = (1, 2, 3, 6, 7, 8, 9, 10) is the universal set. E = (10, 4, 6, 8, 10) and F = is odd. Find (E ∩ F), where means x 1x² = 2⁶, x the complement of a set Options:
  A) (0)
  B) U
  C) (8)
  D) $\varphi$
  Show Answer
  The correct answer is D .