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 2731: Twenty girls and y boys sat on an examination. The mean marks obtained by the girls and boys were 52 and 57 respectively. if the total score for both girls and boys was 2950, find y. Options:
  A) 51
  B) 48
  C) 30
  D) 25
  E) 18
  Show Answer
  The correct answer is C .
• Question 2732:

  The equivalent of (10110.011)${}_2$ in base 10 is?

  Options:
  A) 26.325
  B) 24.372
  C) 42.443
  D) 22.375
  Show Answer
  The correct answer is D .
• Question 2733: A man 40m from the foot of a tower observes the angle of elevation of the tower to be 30^o, Determine the height of the tower Options:
  A) 40m
  B) 40$\sqrt{3}$m
  C) 20m
  D) $\frac{40\sqrt{3}}{3}$
  Show Answer
  The correct answer is D .
• Question 2734: 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 2735: If x + $\frac{1}{x}$ = 4, find x² + $\frac{1}{x^2}$ Options:
  A) 16
  B) 14
  C) 12
  D) 9
  Show Answer
  The correct answer is B .
• Question 2736:

  

  In the diagram above, EFGH is a circle center O. Fh is a diameter and GE is a chord which meets FH at right angle at the point N. If NH = 8cm and EG = 24cm, calculate FH.

  Options:
  A) 16 cm
  B) 20 cm
  C) 26 cm
  D) 32 cm
  Show Answer
  The correct answer is D .
• Question 2737: Simplify (√98 -√50)/√32 Options:
  A) 3
  B) 1
  C) 1/2
  D) 1/4
  Show Answer
  The correct answer is C .
• Question 2738: Ice forms on a refrigerator ice-box at the rate of (4 - 06t)g per minute after t minutes. If initially there are 2g of ice in the box, find the mass of ice formed in 5 minutes Options:
  A) 19.5
  B) 17.0
  C) 14.5
  D) 12.5
  Show Answer
  The correct answer is C .
• Question 2739:

  

  Find the curved surface area of the frustrum in the figure.

  Options:
  A) 16$\pi \sqrt{10}$cm²
  B) 20$\pi \sqrt{10}$cm²
  C) 24$\pi \sqrt{10}$cm²
  D) 36$\pi \sqrt{10}$cm²
  Show Answer
  The correct answer is B .
• Question 2740:

  

  In the figure, $△$PQT is isosceles. PQ = QT, SRQ = 35${}^{\circ }$, TPQ = 20${}^{\circ }$ and PQR is a straight line.Calculate TSR

  Options:
  A) 20${}^{\circ }$
  B) 55${}^{\circ }$
  C) 75${}^{\circ }$
  D) 140${}^{\circ }$
  Show Answer
  The correct answer is C .