IMO Mathematics Olympiad Class 9: Questions 688  694 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: 688
Question
Average weight of 9 persons is 48 kg. If one man weighing 32 kg, died, what is an average age of the remaining 8 persons.
Choices
Choice (4)  Response  

a.  50 

b.  52 

c.  54 

d.  56 

Question number: 689
Question
Given that is a solution of . The other solutions are ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 690
Question
A card is drawn at random from a well shuffled pack of 52 cards. The probability that the ‘9’ of red color card is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 691
Question
=
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 692
Question
If and , then value of y when , is________.
Choices
Choice (4)  Response  

a.  2 

b.  2 

c.  1 

d.  1 

Passage
A Train is going on a long journey for 20 hours, starting at 3.00 hrs. The speed of the car at different hours is given below:
Time (in hrs):

3

5

8

10

12

15

18

20

23

Speed (in km/hour):

60

70

90

50

60

75

60

30

60

From the above table answer the following questions.
Question number: 693 (1 of 3 Based on Passage) Show Passage
Question
The average speed (in km/hour) between 10.00 hrs, 12.00 hrs and 15.00 hrs is ________
Choices
Choice (4)  Response  

a.  62 

b.  63 

c.  68 

d.  57 

Question number: 694 (2 of 3 Based on Passage) Show Passage
Question
The percentage of decrease in speed during 18.00 hrs and 20.00 hrs is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

