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 1831: Convert 3.1415926 to 5 decimal places Options:
  A) 3.14160
  B) 3.14159
  C) 0.31415
  D) 3.14200
  Show Answer
  The correct answer is B .
• Question 1832: If tan $\theta$ = $\frac{5}{4}$ find sin²$\theta$ - cos²$\theta$ Options:
  A) $\frac{9}{41}$
  B) $\frac{5}{4}$
  C) 1
  D) $\frac{9}{1}$
  Show Answer
  The correct answer is A .
• Question 1833:

  A boy walks 800m in 20 minutes. Calculate his average speed in km/h.

  Options:
  A) 2.4
  B) 4
  C) 24
  D) 4.2
  Show Answer
  The correct answer is A .
• Question 1834: X and Y are two events. The probability of X or Y is 0.7 and that of X is 0.4. If X and Y are independent, find the probability of Y. Options:
  A) 0.30
  B) 0.50
  C) 0.57
  D) 1.80
  Show Answer
  The correct answer is A .
• Question 1835: The median of the set of numbers 4, 9, 4, 13, 7, 14, 10, 17 is Options:
  A) 13
  B) 7
  C) $\frac{19}{2}$
  D) $\frac{39}{4}$
  E) 10
  Show Answer
  The correct answer is C .
• Question 1836:

  Find the area, to the nearest cm${}^2$, of the triangle whose sides are in the ratio 2 : 3 : 4 and whose perimeter is 180 cm.

  Options:
  A) 1162 cm${}^2$
  B) 1163 cm${}^2$
  C) 1160 cm${}^2$
  D) 1161 cm${}^2$
  Show Answer
  The correct answer is A .
• Question 1837: Multiply (3x + 5y + 4z) by (2x - 3y + z) Options:
  A) 6x² + xy - 15y² + 4z² + 11xz - 7yz
  B) 6x² + 3xy - 15y² + 4z²
  C) 6x² + 3xy - y² + 4z²
  D) 6x² + 3xy - 15y + z²
  Show Answer
  The correct answer is A .
• Question 1838:

  If log${}_{10}$2 = 0.3010 and log${}_{10}$3 = 0.4771, eventually without using the logarithm tables, log${}_{10}$4.5

  Options:
  A) 0.3010
  B) 0.4771
  C) 0.6532
  D) 0.9542
  Show Answer
  The correct answer is C .
• Question 1839:

  A school boy lying on the ground 30m away from the foot of a water tank towel observes that the angle of elevation of the top of the tank is 60${}^o$. Calculate the height of the tank.

  Options:
  A) 60$\sqrt{3m}$
  B) 30$\sqrt{3m}$
  C) 20$\sqrt{3m}$
  D) 10$\sqrt{3m}$
  Show Answer
  The correct answer is B .
• Question 1840: 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 .