IMO Mathematics Olympiad Class 7: Questions 521  526 of 1012
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Question number: 521
Question
Two equal containers are filled with a mixture of milk and water. The concentration of milk in each of the containers is 20 % and 25 % respectively. What is ratio of water in both the containers respectively?
Choices
Choice (4)  Response  

a.  5: 4 

b.  4: 5 

c.  16: 15 

d.  15: 16 

Question number: 522
Question
There is 25 liters oil in red container and 35 more liters oil in black container. What is the ratio of oil in black container to the total liters of oil in both containers?
Choices
Choice (4)  Response  

a.  19: 14 

b.  9: 14 

c.  15: 9 

d.  14: 19 

Question number: 523
Question
The cost price of a pair of sandal is Rs. 3600 and the profit percent is . Find the selling price of the watch.
Choices
Choice (4)  Response  

a.  Rs. 4450 

b.  Rs. 3420 

c.  Rs. 4510 

d.  Rs. 5200 

Question number: 524
Question
The total cost of 3 tables and 2 chairs is Rs. 745. If one table costs Rs. 40 more than one chair, find the price of each table and chair respectively.
Choices
Choice (4)  Response  

a.  Rs. 160, Rs. 120 

b.  Rs. 165, Rs. 125 

c.  Rs. 200, Rs. 160 

d.  Rs. 120, Rs. 80 

Question number: 525
Question
Mahi uses 120 pearls to make 5 necklaces. How many of the same type of necklaces can Mahi make with 360 pearls?
Choices
Choice (4)  Response  

a.  240 

b.  12 

c.  15 

d.  60 

Question number: 526
Question
When Shreya travelled 68 km she found that of the entire journey was still left. The length of the total journey is
Choices
Choice (4)  Response  

a.  109 km 

b.  102 km 

c.  106 km 

d.  130 km 
