Mathematics 2021 Past Questions | WAEC
Study the following Mathematics past questions and answers for JAMB, WAEC NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.
- A. 60\(^o\)
- B. 40\(^o\)
- C. 90\(^o\)
- D. 120\(^o\)
17. Make U the subject of the relation:
x = \(\frac{2U-3}{3U+2}\)
- A. \(\frac{2x+3}{3x-2}\)
- B. \(\frac{2x-3}{3x-2}\)
- C. \(\frac{2x+3}{2-3x}\)
- D. \(\frac{2x+3}{3x+2}\)
18. A trader paid import duty of 38 kobo in the naira on the cost of an engine If a total of N22,800.00 was paid as import duty, calculate the cost of the engine
- A. N60,000.00
- B. N120,000.00
- C. N24,000.00
- D.N18,000.00
19. The height of an equilateral triangle is 10\(\sqrt{3}\). Calculate its perimeter.
- A. 20cm
- B. 60cm
- C. 40cm
- D. 30cm
20. In triangle LMN, |LM|=6cm, angle LMN = 90o , angle LNM =x and sinx=3/5. Find the area of triangle LMN.
- A. 60cm2
- B. 48cm2
- C. 24cm2
- D. 30cm2
21. Consider the statements:
P: All students offering Lieutenant (L) also offer History (H);
Q: students offering History (H) do not offer Geography (G). which of the venn diagrams correctly illustrate the two statements?
22. Find the quadratic equation whose roots are -2q and 5q.
- A. x2 +3qx -10q2 =0
- B. x2 +3qx +10q2 =0
- C. x2 -3qx +10q2 =0
- D. x2 -3qx -10q2 =0
23. if tan θ=3/4, 180o<θ<270o , find the value of cos θ.
- A. 4/5
- B. 3/5
- C. -4/5
- D. -3/5
24. If \(\frac{2}{x-3}\) – \(\frac{3}{x-2}\) = \(\frac{P}{x-3}\)\({x-2}\), find P
- A. (5-x)
- B. (x+5)
- C. (13-x)
- D. -(5x-13)
25. The diagonals of a rhombus are 12 cm and 5 cm, calculate its perimeter.
- A. 26cm
- B. 24cm
- C. 17cm
- D. 34cm
26.
In the diagram, triangle XYZ is produced to T. if |XY|=|ZY| and angle XYT = 40o , find angle XZT 
- A. 110o
- B. 130o
- C. 120o
- D.140o
27. A solid brass cube is melted and recast as a solid cone of height h and base radius If the height of the cube is h. find r in terms of h
- A. r =h
- B. r = \(\frac{\sqrt{3h}}{π}\)
- C. r = πh
- D. r = h\(\frac{\sqrt{3}}{π}\)
28. Which of the following is not an exterior angle of n regular polygon?
- A. 66o
- B. 72o
- C. 24o
- D. 15o
29. From a point T a man moves 12 km due West and then moves 12 km due South to another point Q. Calculate the bearing of T from Q.
- A. 225o
- B. 315o
- C. 045o
- D. 135o
30. In the diagram, O is the centre of the circle PQRS, angle PQR=72o and OR//PS, find angle OPS.
- A. 18\(^o\)
- B. 108\(^o\)
- C. 54\(^o\)
- D.36\(^o\)
MATHEMATICS PAST QUESTIONS 2020 THEORY
- (a) If A = {multiples of 2}, B = {multiples of 3} and C = {factors of 6} are subsets of μ= {x:1 ≤x 5 ≤ 10} find A ∩ B ∩ C
(b) Tickets for a movie premiere cost $18.00 each while the bulk purchase price for 5 tickets is $80.00. If 4 gentlemen decide to get a fifth person to join them so that they can share the bulk purchase price equally, how much would each person save?
