Multiple choice questions on Mathematics for competitive examination Test 9
This is Test 9 on Mathematics consisting of 20 questions for self check of your preparedness for the competitive examination.
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This is a set of multiple choice questions on Mathematics for competitive examination
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The Answer Key:
Sr No Question Answer Remarks 1 Which is the smallest natural number 1 Natural numbers are 1 to 9 and when 0 is added it becomes whole number. Therefore zero is the smallest whole number 2 Find the greatest length of the scale to measure the length of 4m95cm, 9m, 16m65cm 45cm We have the find the HCF of 495, 900 and 1665 and that will be 45 cm 3 A Pyramid has All A pyramid is a threedimensional shape whose base is a polygon. Each corner of the polygon is attached to a singular apex, which gives the pyramid its distinctive shape. Each base edge and the apex form a triangle. 4 What is the perimeter of the figure shown below: Page 212 VI Maths 52 5 What should be radius of the outer circle for annular area to be equal to the area of the inner circle? under root two times A₁=πr₁² and 2A₁=πr₂²; solving this we get r₂=√2r₁ 6 Which of the following is the highest ratio (27:39) If you solve this problem by LCM, it will take considerable time. Take advantage of your memory of table and solve it. 7 Ram completes a work in 7/12 hrs. and Shyam in 3/4 hrs. Who has the higher capacity of doing work? Ram It is question for handling the way one performs fraction calculations The ratio will 7/12*4/3=7/9 . So Ram takes less time or having higher capacity of doing work 8 For drawing a circle touching all the sides, the center used is incenter 9 The length of the two sides of a triangle are 8 and 6. What will be the range of the third side? 2 to 14 The sum of the length of two sides shall be greater than the three sides and shall not be less than the difference of the two sides 10 Express 432 as product of two prime numbers 2⁴*3³ Prime number has only 1 or number itself prime factors. 432=16*27 and to be expressed in exponent form 11 Name the figure which is not a Polygon (insert) Name the figure which is not a Polygon (insert) The polygon has minimum 3 sides and can be convex or concave. Figure 3 is concave and is also a polygon. 12 Find the value of [√3(1/√3)]² (4/3) 13 A water tank is filled in 4 hours. It is decided to fill it in 3 hours. The flow rate shall be increased by 0.3333 Let the capacity of the water tank is L lts and than the flow rate is L/4 lit/hour. The revised flow rate has to be L/3 lts/hr it means it shall be increased by L/3L/4 or additional L/12 which is an increase of 33⅓% 14 A is thrice as good a workman as B and takes 10 days less to do a piece of work than B takes. B alone can do the whole work in 15 Let B alone does the work in x days than A takes x10 days. The ratio of capacity of doing work of A/B=3=(x/x10) or x=15 15 Find the compound interest on Rs.16,000 at 20% per annum for 9 months, compounded quarterly 2522 Quarterly interest Is 5%; and it is like compounding for three periods i.e. 16000[1+5/100]³=16000[1.157625] = 18522/. The interest amount is 2522/ 16 A polyhedron is said to be convex if All A polyhedron is said to be convex if its surface (comprising its faces, edges and vertices) does not intersect itself and the line segment joining any two points of the polyhedron is contained in the interior or surface. A polyhedron is a 3dimensional example of the more general polytope in any number of dimensions. 17 Find n: [(5)ⁿ*(125)⁻⁶*(5)⁻¹]/(5)⁻⁷=1 12 Under stand that (125)⁻⁶=5⁻¹⁸ and 1=1⁰ 18 Histogram is used when the focus is on data interval 19 Factorize (a³ + b³) (a + b)(a² ab + b²) 20 The height of a triangular base pyramid is 12 m with base area as 24 m. What will be volume of the triangular pyramid in cubic meter? 96 Area of triangular pyramid is given by 1/3(Base Area)*height 
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Question 1 of 20
1. Question
Which is the smallest natural number

Question 2 of 20
2. Question
Find the greatest length of the scale to measure the length of 4m95cm, 9m, 16m65cm

Question 3 of 20
3. Question
A Pyramid has

Question 4 of 20
4. Question

Question 5 of 20
5. Question
What should be radius of the outer circle for annular area to be equal to the area of the inner circle?

Question 6 of 20
6. Question
Which of the following is the highest ratio

Question 7 of 20
7. Question
Ram completes a work in 7/12 hrs. and Shyam in 3/4 hrs. Who has the higher capacity of doing work?

Question 8 of 20
8. Question
For drawing a circle touching all the sides, the center used is

Question 9 of 20
9. Question
The length of the two sides of a triangle are 8 and 6. What will be the range of the third side?

Question 10 of 20
10. Question
Express 432 as product of two prime numbers

Question 11 of 20
11. Question
Name the figure which is not a Polygon

Question 12 of 20
12. Question
Find the value of [√3(1/√3)]²

Question 13 of 20
13. Question
A water tank is filled in 4 hours. It is decided to fill it in 3 hours. The flow rate shall be increased by

Question 14 of 20
14. Question
A is thrice as good a workman as B and takes 10 days less to do a piece of work than B takes. B alone can do the whole work in

Question 15 of 20
15. Question
Find the compound interest on Rs.16,000 at 20% per annum for 9 months, compounded quarterly

Question 16 of 20
16. Question
A polyhedron is said to be convex if

Question 17 of 20
17. Question
Find n: [(5)ⁿ*(125)⁻⁶*(5)⁻¹]/(5)⁻⁷=1

Question 18 of 20
18. Question
Histogram is used when the focus is on

Question 19 of 20
19. Question
Factorize (a³ + b³)

Question 20 of 20
20. Question
The height of a triangular base pyramid is 12 m with base area as 24 m. What will be volume of the triangular pyramid in cubic meter?
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