Mathematics 2020 Past Questions | JAMB
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.
31. The chord ST of a circle is equal to the radius r of the circle. Find the length of arc ST
- A. πr/3
- B. πr/2
- C. πr/12
- D. πr/6
32. A sector of circle of radius 7.2cm which subtends an angle of 300oat the centre is used to form a cone. What s the radius of the base of the cone?
- A. 8cm
- B. 9cm
- C. 6cm
- D. 7cm
33. A cylindrical tank has a capacity of 3080m3. What is the depth of the tank if the diameter of its base is 14m?
- A. 25m
- B. 23m
- C. 22m
- D. 20m
34. The acres for rice, pineapple, cassava, cocoa and palm oil in a certain district are given respectively as 2, 5, 3, 11 and 9. What is the angle of the sector of cassava in a pie chart?
- A. 180o
- B. 36o
- C. 60o
- D. 108o
35. Three consecutive terms of a geometric progression are give as n – 2, n and n + 3. Find the common ratio
- A. 3/2
- B. 2/3
- C. 1/2
- D. 1/4
36. In a class of 40 students, 32 offer mathematics, 24 offer physics and 4 offer neither mathematics nor physics. How many offer both mathematics and physics?
- A. 4
- B. 8
- C. 16
- D. 20
37. The sum of the interior angle of pentagon is 6x + 6y. Find y in terms of x.
- A. y = 6 – x
- B. y = 90 – x
- C. y = 120 – x
- D. y = 150 – x
38. The mean age group of some students is 15years. When the age of a teacher, 45 years old, is added to the ages of the students, the mean of their ages become 18 years. Find the number of students in the group.
- A. 7
- B. 9
- C. 15
- D. 42
39. A surveyor walks 500m up a hill which slopes at an angle of 30o. Calculate the vertical height through which he rises
- A. 252m
- B. 500m
- C. 250m
- D. 255m
40. Find the non-zero positive value of x which satisfies the equation
- A. 2
- B. √3
- C. √2
- D. 1
