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 1771: The H.C.F. of a²bx + ab²x and a²b - b² is Options:
  A) b
  B) a + b
  C) b(a $÷$ b)
  D) abx(a² - b²)
  Show Answer
  The correct answer is B .
• Question 1772: Find the least length of a rod which can be cut into exactly equal strips, each of either 40cm or 48cm in length Options:
  A) 120cm
  B) 240cm
  C) 360cm
  D) 480cm
  Show Answer
  The correct answer is B .
• Question 1773:

  At simple interest, a man made a deposit of some money in the bank. The amount in his bank account after 10 years is three times the money deposited. If the interest rate stays the same, after how many years will the amount be five times the money deposited?

  Options:
  A) 15 years
  B) 25 years
  C) 20 years
  D) 30 years
  Show Answer
  The correct answer is C .
• Question 1774: Find the radius of a sphere whose surface area is 154 cm² Options:
  A) 7.00 cm
  B) 3.50 cm
  C) 3.00 cm
  D) 1.75 cm
  Show Answer
  The correct answer is B .
• Question 1775:

  Evaluate ${\int }_{-1}^1$(2x + 1)²dx

  Options:
  A) 3$\frac{2}{3}$
  B) 4
  C) 4$\frac{1}{3}$
  D) 4$\frac{2}{3}$
  Show Answer
  The correct answer is D .
• Question 1776: Find the value of 2a - b if a + b = 8 and 4a - b = 22 Options:
  A) 2
  B) 4
  C) 6
  D) 8
  E) 10
  Show Answer
  The correct answer is E .
• Question 1777:

  $\begin{array}{ccccccc}\text{Numbers}& 1& 2& 3& 4& 5& 6\\ \text{Frequency}& 18& 22& 20& 16& 10& 14\end{array}$

  The table above represents the outcome of throwing a die 100 times. What is the probability of obtaining at least a 4?

  Options:
  A) $\frac{1}{5}$
  B) $\frac{1}{2}$
  C) $\frac{2}{5}$
  D) $\frac{3}{4}$
  Show Answer
  The correct answer is C .
• Question 1778: Factorize 6^{2x + 1} + 7(6^x) - 5 Options:
  A) [3(6^x) - 5][2(6^x)m + 1]
  B) [3(6^x) + 5][2(6^x) - 1]
  C) [(6^x) - 5][3(6^x) + 1]
  D) [2(6^x) + 5][3(6^x) - 1]
  Show Answer
  The correct answer is B .
• Question 1779: Solve for x and y if x - y = 2 and x² - y² = 8 Options:
  A) (-1, 3)
  B) (3, 1)
  C) (-3, 1)
  D) (1, 3)
  Show Answer
  The correct answer is B .
• Question 1780:
  

  Calculate, correct to three significant figures, the length of the arc AB in the diagram above.
  [Take $\pi {=}^{22}{/}_7$]

  Options:
  A) 32.4 cm
  B) 30.6 cm
  C) 28.8 cm
  D) 30.5 cm
  Show Answer
  The correct answer is B .