B A F Shaheen College Dhaka Practice Half Yearly Examination-2020
Class-IX (English Version)
Subject: General Math (MCQ)
Time: 30 Minutes Full Marks: 30 [N.B.
Darken the correct option in OMR with black ball point pen
] 1. How many primes are there from 1 to 10?(a) 3 (b) 4 (c) 5 (d) 6
2. Which one is natural number?
(a) 4 (b) -4 (c) −4
8
(d) √7
3. The numbers
i. 2.5 is a rational number ii. √11 is a prime number iii. 0 is a positive number
Which one is correct?
(a) Only i (b) i and iii (c) ii and iii (d) i, ii and iii 4. Which one is irrational number?
(a) √2 (b) √5 + √7 (c) 𝜋 (d) all
5. A={0,1,2} is an expression of which method?
(a) Set builder (b) Tabular (c) Venn diagram (d) none
Answer Question 6 to 9 from the following figure
U 6. B\A=?
(a) {1, 2} (b) {2, 3} (c) {3} (d) {1, 2, 3}
7. If U={1, 2, 3, 4} then what is the value of B’?
(a) {1, 4} (b) {1, 2} (c) {1, 3} (d) {3, 4}
8. U – (A∩B)=?
(a) {1, 2, 4} (b) {1, 3, 4} (c) {1, 2, 3} (d) {1, 2, 3, 4}
9. What is the value of U\(AUB)?
(a) {1, 2} (b) {1, 4} (c) {1, 2, 3} (d) {4}
10. f(x) is a function when Dom f(x) = Range f(x). Which is f(x) =?
(a) x+1 (b) y-5 (c) x=2 (d) x
11. If p(x)=x – 1, what is the value of p(0)?
(a) 0 (b) 1 (c) -1 (d) 2
12. Which is the square of (𝑥 − 𝑦)?
(a) (𝑥 − 𝑦) (b) 𝑥2+ 𝑦2− 2𝑦 (c) (𝑥 − 𝑦)2 (d) 2xy 13. If a= b = c = -1, then 2𝑎𝑏 − 𝑎2− 𝑏2+ 𝑐2= ?
(a) 1 (b) 2 (c) 3 (d) 4
14. If Sin3A = Cos3A, which one is correct?
(a) A=15° (b) A=45° (c) A=30° (d) A=20°
15. What is 𝑡𝑎𝑛𝜃√(1 − sin2𝜃)?
(a) 𝑠𝑖𝑛𝜃 (b) 𝑠𝑒𝑐𝜃 (c) 0 (d) 𝑐𝑜𝑠𝑒𝑐𝜃
16. What is sin2𝐴 + cos2𝐴?
(a) 1 (b) sec2𝐴 − tan2𝐴 (c) Both (a) and (b) (d) None
17. Which one is correct?
(a) 𝑠𝑖𝑛𝐴 = 1 cos 𝐴
(b) 𝑡𝑎𝑛𝐴 = 1 𝑐𝑜𝑡𝐴
(c) 𝑠𝑒𝑐𝐴 = 1 𝑐𝑜𝑠𝑒𝑐𝐴
(d) 𝑡𝑎𝑛𝐴 + sin2𝐴 = 1 18. What is the area of a triangle with base b and height h?
(a) .5ab (b) bh (c) 1
2bh (d) None
19. If area of a triangle is √(𝑠(𝑠 − 𝑎)(𝑠 − 𝑏)(𝑠 − 𝑐)), what is s?
(a) perimeter (b) a+b+c (c) Half perimeter (d) Both (b) and (c) 20. What is the area of an equilateral triangle with side length a?
(a) 𝑎2 (b) 2ab (c) √3
4 𝑎2 (d) √3
4 𝑎 21. In a triangle a=2 cm, b=3 cm and ∠𝐶 = 30°, what is its area?
(a) 1.2 sq. cm (b) 1.5 cubic cm (c) 3/2 sq. cm (d) 48 cubic cm 22. In a triangle with sides a, b and c and angles ∠𝐴, ∠𝐵, ∠𝐶 what is its area?
(a) 𝑎𝑏 × 𝑆𝑖𝑛𝐶 (b) abc (c) 2𝜋 (d) 0.5 × 𝑏𝑐𝑆𝑖𝑛𝐴
23. If AB||CD and EF is their transversal then how many angles are created?
(a) 4 (b) 6 (c) 8 (d) 10
Answer (24-26) from the following figure C
A O 90° B
D 24. ∠𝐵𝑂𝐷 =?
(a) 180° (b) 90° (c) 0° (d) 100°
25. How many right angles are in the figure?
(a) 2 (b) 4 (c) 8 (d) 1
26. Which can be possible sides of a triangle?
(a) 1, 2, 4 unit (b) 7, 9, 2 unit (c) 3, 4, 5 unit (d) 2, 5, 6 unit 27. Cumulative frequency table is needed to determine ?
(a) Mean (b) Arithmetic mean (c) Median (d) Mode
28. 20, 30, 30, 30, 20, 40, 40 are the numbers and their mode is-
(a) 20 (b) 30 (c) 40 (d) 35
29. Which is discrete variable?
(a) Number of students in a class
(b) Weight of rice (c) Height of people (d) Amount of milk 30. Which is the measure of central tendency?
(a) Mode (b) Mean (c) Median (d) All
