IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 552  556 of 1012
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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.  1.2 minutes 

b.  3.2 minutes 

c.  2.4 minutes 

d.  2.8 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. 366 

b.  Rs. 167 

c.  Rs. 260 

d.  Rs. 136 

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.  112.5 km 

b.  67.5 km 

c.  150 km 

d.  45 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.  18 minutes 

b.  12 minutes 

c.  24 minutes 

d.  6 minutes 

Question number: 556
Question
In our office there are 60 % female employees. 50 % of all the male employees are computer literate. If there 62 % employees are computer literate out of the total 1600 employees, then the number of female employees who are computer literate is ________.
Choices
Choice (4)  Response  

a.  690 

b.  960 

c.  672 

d.  Can’t be determined 
