IMO Mathematics Olympiad Class 9: Questions 889  895 of 919
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 919 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 450.00 or
Question number: 889
Question
The number of positive integers k for which the equation has an integer solution for x is ________
Choices
Choice (4)  Response  

a.  0 

b.  1 

c.  1 

d.  2 

Question number: 890
Question
A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what is was before, then x is________
Choices
Choice (4)  Response  

a.  3 

b.  7 

c.  5 

d.  2 

Question number: 891
» Introduction to Euclid's Geometry
Question
Two angles are complementary. The measure of one angle is 15˚ more than twice the other. What is the measure of the smaller angle?
Choices
Choice (4)  Response  

a.  25˚ 

b.  35˚ 

c.  55˚ 

d.  65˚ 

Question number: 892
Question
Value of when , is ________
Choices
Choice (4)  Response  

a.  3 

b.  1 

c.  2 

d.  0 

Question number: 893
» Linear Equations in Two Variables
Question
Equation of the yaxis, is
Choices
Choice (4)  Response  

a.  y=x 

b.  y = x 

c.  x = 0 

d.  y = 0 

Passage
A Bus is going on a long journey for 25 hours, starting at 6.00 hrs. The speed of the car at different hours is given below:
Time (in hrs):

6

8

9

13

14

18

20

22

25

Speed (in km/hour):

30

60

50

40

60

70

80

60

20

From the above table answer the following questions.
Question number: 894 (1 of 3 Based on Passage) Show Passage
Question
The percentage of decrease in speed during 22.00 hrs and 25.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 895 (2 of 3 Based on Passage) Show Passage
Question
The percentage of increase in speed during 14.00 hrs and 18.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

