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 1791: A binary operation $\mathrm{\Delta }$ is defined is defined by a $\mathrm{\Delta }$ b = a + b + 1 for any real numbers a and b. Find the inverse of the real number 7 under the operation $\mathrm{\Delta }$, if the identify element is -1 Options:
  A) -1
  B) 5
  C) -7
  D) -9
  E) 9
  Show Answer
  The correct answer is D .
• Question 1792: Find the absolute mean deviation of the sample 10, 12, 14, 11, 13. Options:
  A) 14.6
  B) 14
  C) 12
  D) 6.2
  E) 1.2
  Show Answer
  The correct answer is E .
• Question 1793:

  If pq + 1 = q² and t = $\frac{1}{p}$ - $\frac{1}{pq}$ express t in terms of q

  Options:
  A) $\frac{1}{p-q}$
  B) $\frac{1}{q-1}$
  C) $\frac{1}{q+1}$
  D) $1+q$
  E) $\frac{1}{1-q}$
  Show Answer
  The correct answer is C .
• Question 1794:

  Mr Adu spends his annual salary on food(f), rent(r), car maintenance, gifts(g), savings(s) and some miscellaneous (m) as indicate in the table below:

  F	R	C	G	S	M
  28%	15%	20%	14%	10%	13%

  If the above information is represented on a pie chart. What angle represents his spending on food?

  Options:
  A) 108.5
  B) 100.8
  C) 98.8
  D) 120.5
  Show Answer
  The correct answer is B .
• Question 1795: The ratio of the base area of a hollow cone to that of its curved surface is 1:4. If its base radius is 7cm, calculate the slant height of the cone Options:
  A) 7cm
  B) 22cm
  C) 28cm
  D) 49cm
  E) 154cm
  Show Answer
  The correct answer is C .
• Question 1796: Two ladders of length 5m and 7m lean against a pole and make angles 45° and 60° with the ground respectively. What is their distance apart on the pole correct to two decimal places? Options:
  A) 9.60m
  B) 6.06m
  C) 2.54m
  D) 2.53m
  E) 2.00m
  Show Answer
  The correct answer is D .
• Question 1797: Two ladders of length 5m and 7m lean against a pole and make angles 45° and 60° with the ground respectively. What is their distance apart on the pole correct to two decimal places? Options:
  A) 9.60m
  B) 6.06m
  C) 2.54m
  D) 2.53m
  E) 2.00m
  Show Answer
  The correct answer is D .
• Question 1798: A construction company is owned by two partners X and Y and it is agreed that their profit will be divided in the ratio 4:5. At the end of the year, Y received ₦5,000 more than X. What is the total profit of the company for the year? Options:
  A) ₦20, 000
  B) ₦25,000
  C) ₦30,000
  D) ₦15,000
  E) ₦45, 000
  Show Answer
  The correct answer is E .
• Question 1799:

  Solve for t in the equation $\frac{3}{4}$t + $\frac{1}{3}$(21 - t) = 11

  Options:
  A) $\frac{9}{13}$
  B) $\frac{7}{13}$
  C) 5
  D) 9$\frac{3}{5}$
  Show Answer
  The correct answer is D .
• Question 1800: Find the eleventh term of the progression 4, 8, 16..... Options:
  A) 2¹³
  B) 2¹²
  C) 2¹¹
  D) 2¹⁰
  Show Answer
  The correct answer is B .