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 621: If x + 2 and x - 1 are factors of the expression 1x³ + 2kx² + 24, find the values of 1 and K Options:
  A) 1 = -6, k = -9
  B) 1 = -2, k = 1
  C) k = -1, 1 = -2
  D) 1 = 0, k = 1
  E) k = 0,1 = 6
  Show Answer
  The correct answer is A .
• Question 622:

  Let '*' and '^' be two binary operations such that a * b = a${}^2$b and a ^ b = 2a + b. Find (-4 * 2) ^ (7 * -1).

  Options:
  A) -49
  B) 64
  C) 113
  D) 15
  Show Answer
  The correct answer is D .
• Question 623: Find the value of log₁₀ r + log₁₀ r² + log₁₀ r⁴ + log₁₀ r⁸ + log₁₀ r¹⁶ + log₁₀ r³² = 63 Options:
  A) 10^-1
  B) 10^o
  C) 10
  D) 10²
  Show Answer
  The correct answer is C .
• Question 624:

  Find all median of the numbers 89, 141, 130, 161, 120, 131, 131, 100, 108 and 119

  Options:
  A) 131
  B) 125
  C) 123
  D) 120
  Show Answer
  The correct answer is B .
• Question 625: A bag contains 4 white balls and 6 red balls. Two balls are taken from the bag without replacement. What is the probability that they are both red? Options:
  A) $\frac{2}{3}$
  B) $\frac{2}{15}$
  C) $\frac{1}{2}$
  D) $\frac{1}{3}$
  Show Answer
  The correct answer is D .
• Question 626: Simplify $(\sqrt{6}+2{)}^2-(\sqrt{6}-2{)}^2$ Options:
  A) $2\sqrt{6}$
  B) $4\sqrt{6}$
  C) $8\sqrt{6}$
  D) $16\sqrt{6}$
  Show Answer
  The correct answer is C .
• Question 627:

  The weight of a day-old chick was measured to be 0.21g. If the actual weight of the chick is 0.18g, what was the percentage error in the measurement?

  Options:
  A) 15.5%
  B) 18.2%
  C) 14.8%
  D) 16.7%
  Show Answer
  The correct answer is D .
• Question 628: Evaluate $\frac{21}{9}$ to 3 significant figures Options:
  A) 2.30
  B) 2.31
  C) 2.32
  D) 2.33
  Show Answer
  The correct answer is D .
• Question 629: Evaluate ∫sin 3x dx Options:
  A) (2/3) cos 3x + c
  B) (1/3) cos 3x + c
  C) (-1/3) cos 3x + c
  D) (-2/3) cos 3x + c
  Show Answer
  The correct answer is C .
• Question 630: A basket contains 9 apples, 8 bananas and 7 oranges. A fruit is picked from the basket, find the probability that it is neither an apple nor an orange. Options:
  A) $\frac{3}{8}$
  B) $\frac{1}{3}$
  C) $\frac{7}{24}$
  D) $\frac{2}{3}$
  Show Answer
  The correct answer is B .