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 751:

  Find the value of y if ${402}_y={102}_{ten}$

  Options:
  A) 4
  B) 2
  C) 5
  D) 3
  Show Answer
  The correct answer is C .
• Question 752:

  find the range of values of values of r which satisfies the following inequality, where a, b and c are positive $\frac{r}{a}$ + $\frac{r}{b}$ + $\frac{r}{c}$ > 1

  Options:
  A) r > $\frac{abc}{bc+ac+ab}$
  B) r < abc
  C) r > $\frac{1}{a}$ + $\frac{1}{b}$ + $\frac{1}{c}$
  D) r < $\frac{1}{abc}$
  Show Answer
  The correct answer is A .
• Question 753: Rationalize the expression $\frac{(7-\sqrt{3})}{(13-\sqrt{3})}$ Options:
  A) (44 + 3$\sqrt{3}$) ÷ 83
  B) (44 + 2$\sqrt{3}$) ÷ 83
  C) (44 - 3$\sqrt{3}$) ÷ 83
  D) (44 - 4$\sqrt{3}$) ÷ 83
  E) (44 - 2$\sqrt{3}$) ÷ 83
  Show Answer
  The correct answer is C .
• Question 754:

  If a fair coin is tossed twice, what is the probability of obtaining at least one head?

  Options:
  A) 0.25
  B) 0.75
  C) 0.5
  D) 0.33
  Show Answer
  The correct answer is B .
• Question 755: 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 756:

  

  The mean and the range of the set of numbers 1, 20, 1.00, 0.90, 1.40, 0.80, 1.20 and 1.10 are me and r

  Options:
  A) 1.11
  B) 1.65
  C) 1.85
  D) 2.45
  Show Answer
  The correct answer is B .
• Question 757: A 5.0g of salt was weighted by Tunde as 5.1g. What is the percentage error? Options:
  A) 20
  B) 2
  C) 1.1
  D) 0.2
  Show Answer
  The correct answer is B .
• Question 758: Simplify $\frac{1\frac{1}{2}}{\text{2 + }\frac{1}{4}\text{ of 32}}$ Options:
  A) $\frac{3}{256}$
  B) $\frac{3}{32}$
  C) 6
  D) 85
  Show Answer
  The correct answer is C .
• Question 759: Calculate without using tables Tan 45° + Cos 60° Options:
  A) $\sqrt{\frac{3}{2}}$ - 1
  B) $\frac{1}{2}$
  C) 1$\frac{1}{2}$
  D) $\sqrt{\frac{3}{2}}$ + 1
  E) 2
  Show Answer
  The correct answer is C .
• Question 760: The sum of the interior angles of a polygon is 20 right angles. How many sides does the polygon have? Options:
  A) 12
  B) 20
  C) 40
  D) 10
  Show Answer
  The correct answer is A .