# Mathematics 2020 Past Questions | JAMB

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

1. Evaluate (212)3– (121)3+ (222)3
• A. (313)3
• B. (1000)3
• C. (1020)3
• D. (1222)3

2. Factorise (4a + 3)2– (3a – 2)2

• A. (a + 1)(a + 5)
• B. (a – 5)(7a – 1)
• C. (a + 5)(7a + 1)
• D. a(7a + 1)

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

• A. 131
• B. 125
• C. 123
• D. 120

4. Find all real number x which satisfy the inequality 1/3(x + 1) – 1 > 1/5(x + 4)

• A. x < 11
• B. x < -1
• C. x > 6
• D. x > 11

5. Reach each number to two significant figures and then evaluate 0.02174 x 1.2047/ 0.023789

• A. 0
• B. 0.9
• C. 1.1
• D. 1.2

6. Four boys and ten girls can cut a field first in 5 hours. If the boys work at 5/4the rate at which the girls work, how many boys will be needed to cut the field in 3 hours?

• A. 180
• B. 60
• C. 25
• D. 20

7. What is the circumference of latitude 0oS if R is the radius of the earth?

• A. cosθ
• B. 2πR cosθ
• C. R sin θ
• D. 2 πr sinθ

8. A room is 12m long, 9m wide and 8m high. Find the cosine of the angle which a diagonal of the room makes with the floor of the room

• A. 15/17
• B. 8/17
• C. 8/15
• D. 12/17

9. The goals scored by 40 football teams from three league divisions are recorded below

 No of goals 0 1 2 3 4 5 6 Frequency 4 3 15 16 1 0 1

What is the total number of goals scored by all the teams?

• A. 21
• B. 40
• C. 91
• D. 96

10. In a class of 150 students, the sector in a pie chart representing the students offering physics has angle 12o. How many students are offering physics?

• A. 18
• B. 15
• C. 10
• D. 5

11. If log102 = 0.3010 and log103 = 0.4771, eventually without using the logarithm tables, log105

• A. 0.3010
• B. 0.4771
• C. 0.6532
• D. 0.9542

12.
Simplify $$\frac{324 – 4x^2}{2x + 18}$$

• A. 2(x – 9)
• B. 2(9 + x)
• C. 81 – x22
• D. -2(x – 9)

13. In preparing rice cutlets, a cook used 75g of rice, 40g of margarine, 105g of meat and 20g of bread crumbs. Find the angle of the sector which represent meat in a pie chart?

• A. 30o
• B. 60o
• C. 112.5o
• D. 157.5o

14. The angle of a sector of a circle radius 10.5 cm is 48o. Calculate the perimeter of the sector.

• A. 25.4cm
• B. 25.4cm
• C. 25.6cm
• D. 29.8cm
15.

What is the product of $$\frac{27}{5}$$, $$(3)^{-3}$$ and ($$\frac{1}{5})^{-1}$$?

• A. 5
• B. 3
• C. 1
• D. $$\frac{1}{25}$$

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