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 551:

  The mean of ten positive numbers is 16. When another number is added, the mean becomes 18. Find the eleventh number

  Options:
  A) 3
  B) 16
  C) 38
  D) 30
  Show Answer
  The correct answer is C .
• Question 552:

  factorize m${}^3$ - m${}^2$ + 2m - 2

  Options:
  A) (m² + 1)(m - 2)
  B) (m - 1)(m + 1)(m + 2)
  C) (m - 2)(m + 1)(m - 1)
  D) (m² + 2)(m - 1)
  Show Answer
  The correct answer is D .
• Question 553: If r varies inversely as the square root of s and t, how does s vary with r and t? Options:
  A) s varies inversely as r and t²
  B) s varies inverely as r² and t
  C) s varies directly as r² and t²
  D) s varies directly as r and t
  Show Answer
  The correct answer is B .
• Question 554: Write down the number 0.0052048 correct to three significant figures Options:
  A) 0.005
  B) 0.0052
  C) 0.00520
  D) 5.2048
  E) 5204
  Show Answer
  The correct answer is C .
• Question 555: Simplify $\frac{1}{1+\sqrt{5}}$ - $\frac{1}{1-\sqrt{5}}$ Options:
  A) - $\frac{1}{2}\sqrt{5}$
  B) $\frac{1}{2}\sqrt{5}$
  C) -- $\frac{1}{4}\sqrt{5}$
  D) 5
  Show Answer
  The correct answer is A .
• Question 556: Simplify $\frac{1}{x-2}$ + $\frac{1}{x+2}$ + $\frac{2x}{x^2-4}$ Options:
  A) $\frac{2x}{(x-2)(x+2)(x^2-4)}$
  B) $\frac{2x}{x^2-4}$
  C) $\frac{x}{x^2-4}$
  D) $\frac{4x}{x^2-4}$
  Show Answer
  The correct answer is D .
• Question 557: A trader bought goats for N4000 each. He sold them for N180,000 at a loss of 25%. How many goats did he buy? Options:
  A) 60
  B) 50
  C) 45
  D) 36
  Show Answer
  The correct answer is A .
• Question 558: if X = {n² + 1 : n = 0, 2, 3} and y = {n + 1 : n = 2, 3, 4, 5}, find x ∩ y Options:
  A) {1, 3}
  B) {5,10}
  C) $\mathrm{\Phi }$
  D) (4, 6)
  Show Answer
  The correct answer is C .
• Question 559:

  

  The diagram is a circle with centre O. Find the area of the shaded portion.

  Options:
  A) 9($\pi -2)c{m}^2$
  B) 18$\pi c{m}^2$
  C) 9$\pi c{m}^2$
  D) 36$\pi c{m}^2$
  Show Answer
  The correct answer is A .
• Question 560: Factorize 9(x + y)² - 4(x - y)² Options:
  A) (x + y)(5x + y)
  B) (x + y)²
  C) (x + 5y)(5x + y)
  D) 5(x + y)²
  Show Answer
  The correct answer is C .