Everyday Mathematics (IMO Mathematics Olympiad (SOF) Class 9): Questions 18  22 of 99
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Question number: 18
» Everyday Mathematics
Question
P and Q can do a piece of work in 15 days and Q alone can do it in 30 days. The time taken by P alone to do the work is ________
Choices
Choice (4)  Response  

a.  35 days 

b.  12 days 

c.  40 days 

d.  30 days 

Question number: 19
» Everyday Mathematics
Question
In Arun’s opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun’s weight is greater than 60 kg but less than 70 kg. His mother’s view is that his weight cannot be greater than 68 kg. If all of them are correct in their estimations, what is the average of different probable weights of Arun?
Choices
Choice (4)  Response  

a.  68 kg 

b.  67 kg 

c.  69 kg 

d.  Question does not provide sufficient data or is vague 

Question number: 20
» Everyday Mathematics
Question
A, B and C enter into partnership by making investments in the ratio. After a year, C invests another Rs. 337600 while A withdrew Rs. 45600. The ratio of investments then changes to. How much did A invest initially?
Choices
Choice (4)  Response  

a.  Rs. 96000 

b.  Rs. 141600 

c.  Rs. 45600 

d.  Question does not provide sufficient data or is vague 

Question number: 21
» Everyday Mathematics
Question
Hussain’s weight is times more than the weight of Rahim. Their total weight is 90 kg. what is Hussain’s weight?
Choices
Choice (4)  Response  

a.  90 kg 

b.  20 kg 

c.  40 kg 

d.  50 kg 

Question number: 22
» Everyday Mathematics
Question
The difference between a discount of on Rs. 1000 and two successive discounts of on the same amount is ________
Choices
Choice (4)  Response  

a.  Rs. 14.56 

b.  Rs. 18.40 

c.  Rs. 22 

d.  Rs. 17.20 
