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 71: Simplify $\frac{5^x\times {25}^{x-1}}{{125}^{x-1}}$ Options:
  A) 5^{2x + 1}
  B) 5^{x + 1}
  C) 5^-5
  D) 5²
  E) 5³
  Show Answer
  The correct answer is C .
• Question 72: Find P, if 451₆ - P₇ = 305₆ Options:
  A) 62₇
  B) 116₇
  C) 611₇
  D) 142₇
  Show Answer
  The correct answer is B .
• Question 73: Given T = {even numbers from 1 to 12}
  N = {common factors of 6, 8 and 12}
  Find T ∩ N Options:
  A) {2, 3}
  B) {2, 3, 4}
  C) {3, 4, 6}
  D) {2}
  Show Answer
  The correct answer is D .
• Question 74:

  The locus of a point which moves so that it is equidistant from two intersecting straight lines is the?

  Options:
  A) perpendicular bisector of the two lines
  B) angle bisector of the two lines
  C) bisector of the two lines
  D) line parallel to the two lines
  Show Answer
  The correct answer is B .
• Question 75: If the maximum value of $y=1+hx-3x^2$ is $13$, find $h$. Options:
  A) 13
  B) 12
  C) 11
  D) 10
  E) 14
  Show Answer
  The correct answer is B .
• Question 76: Factorize 2y² - 15xy + 18x² Options:
  A) (2y - 3x) (y + 6x)
  B) (2y - 3x) (y - 6x)
  C) (2y + 3x) (y - 6x)
  D) (3y + 2x) (y - 6x)
  Show Answer
  The correct answer is B .
• Question 77:

  Given that A = {1, 5, 7}

  B = {3, 9, 12, 15}

  C = {2, 4, 6, 8}

  Find (A ∪ B) ∪ C

  Options:
  A) {1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15}
  B) {1, 2, 3, 5, 6, 8, 12, 15}
  C) {2, 4, 5, 9, 12, 15}
  D) {1, 5, 6, 7, 8, 9, 12, 15}
  Show Answer
  The correct answer is A .
• Question 78: Find the mean deviation of 20, 25, 21, 27, 28, 29, to the nearest whole number Options:
  A) 2
  B) 3
  C) 4
  D) 5
  E) 6
  Show Answer
  The correct answer is B .
• Question 79:

  

  In the figure PT is a tangent to the circle with centre at O. If PQT = 30${}^{\circ }$, find the value of PTO

  Options:
  A) 30${}^{\circ }$
  B) 50${}^{\circ }$
  C) 24${}^{\circ }$
  D) 12${}^{\circ }$
  E) 60${}^{\circ }$
  Show Answer
  The correct answer is B .
• Question 80: Given that x² + y² + z² = 194, calculate z if x = 7 and $\sqrt{y}$ = 3 Options:
  A) $\sqrt{10}$
  B) 8
  C) 12.2
  D) 13.4
  Show Answer
  The correct answer is B .