IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 550  555 of 1022
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Question number: 550
Question
There are 6 stones in a box with numbers 1 to 6 marked on them. What is the probability of drawing a stone with number 6?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  1 

Question number: 551
Question
The total cost of 5 books and 3 bags is Rs. 2500. If one book costs Rs. 25 less than one bag, find the price of each book and bag respectively.
Choices
Choice (4)  Response  

a.  Rs. 320, Rs. 380 

b.  Rs. 303, Rs. 328 

c.  Rs. 300, Rs. 320 

d.  Rs. 330, Rs. 308 

Question number: 552
Question
Three bells toll at intervals of 12 seconds, 16 seconds and 18 seconds respectively. They start ringing together at a particular time. They next toll together after ________.
Choices
Choice (4)  Response  

a.  2.8 minutes 

b.  2.4 minutes 

c.  3.2 minutes 

d.  1.2 minutes 

Question number: 553
Question
Equal sums of Rs. 3400 were lent to Kajal and Misha at 2 % per annum for a period of 3 years and 5 years respectively. Find the difference of the interest paid by Kajal and Misha.
Choices
Choice (4)  Response  

a.  Rs. 167 

b.  Rs. 260 

c.  Rs. 136 

d.  Rs. 366 

Question number: 554
Question
When Ravesh travelled 45 km he found that of the entire journey was still left. The length of the journey left is
Choices
Choice (4)  Response  

a.  67.5 km 

b.  45 km 

c.  150 km 

d.  112.5 km 

Question number: 555
Question
Three bells toll at intervals of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. They next toll together after ________.
Choices
Choice (4)  Response  

a.  12 minutes 

b.  24 minutes 

c.  18 minutes 

d.  6 minutes 
