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 2451:

  I.S∩T∩W=S II. S∪T∪W=S

  III. T∩W=S

  If S⊂T⊂W, which of the above statements are true?

  Options:
  A) I and II
  B) I and III
  C) II and III
  D) I, II and III
  Show Answer
  The correct answer is D .
• Question 2452: Four pupils have an average age of 12years and two other pupils of average age of 10.5years are added. What is the average age of the six pupils? Options:
  A) 10.5yrs.
  B) 11yrs.
  C) 11.5 yrs.
  D) 12yrs.
  E) 12.5yrs.
  Show Answer
  The correct answer is C .
• Question 2453:

  If x = {n²+1:n is a positive integer and 1 $\le$ n $\le$ 5}, y = {5n:n is a positive integer and 1 $\le$ n $\le$ 5}, find x $\cap$ y.

  Options:
  A) {5,10}
  B) {5, 10, 15}
  C) {2, 5, 10}
  D) {5, 10, 15, 20}
  Show Answer
  The correct answer is A .
• Question 2454: If x₁₀ = 23₅. Find x Options:
  A) 15
  B) 12
  C) 14
  D) 13
  Show Answer
  The correct answer is D .
• Question 2455: Find a two-digital number such that three times the terms digit is 2 less than twice the units digit and twice the number is 20 greater than the number obtained by reversing the digits Options:
  A) 24
  B) 42
  C) 74
  D) 47
  E) 72
  Show Answer
  The correct answer is D .
• Question 2456: Find the value of k such that $t^2$ + kt + $\frac{25}{4}$ is a perfect square Options:
  A) 5
  B) 3
  C) $\frac{5}{2}$
  D) $\frac{5}{4}$
  E) $\frac{1}{5}$
  Show Answer
  The correct answer is A .
• Question 2457:

  Solve for x: 3(x 1) ≤ 2 (x 3)

  Options:
  A) x ≤ -3
  B) x ≥ -3
  C) x ≤ 3
  D) x ≥ 3
  Show Answer
  The correct answer is A .
• Question 2458: 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 2459: x varies directly as y and inversely as z. when x = 5, y = 2 and z = 1. What is the value of x when y = 5 and z = 2? Options:
  A) 2.5
  B) 5
  C) 6.25
  D) 6.52
  E) 7.5
  Show Answer
  The correct answer is C .
• Question 2460:

  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 .