IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 477  482 of 1022
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Question number: 477
Question
Kiran answered of the questions on her quiz correctly. What percent of the questions did she answer incorrectly?
Choices
Choice (4)  Response  

a.  75% 

b.  25% 

c.  50% 

d.  34% 

Question number: 478
Question
Jimmy’s and her mother both had birthdays last month. The sum of their ages is 75 years. His mother’s age is 4 times Jimmy’s age. What is age of Jimmy’s mother?
Choices
Choice (4)  Response  

a.  45 years 

b.  60 years 

c.  15 years 

d.  50 years 

Question number: 479
Question
Each of two groups of tourists has 30 students. If of the first group and of the second group board buses to travel to a tour, how many more students of the first group board buses than of the second group?
Choices
Choice (4)  Response  

a.  4 

b.  40 

c.  2 

d.  5 

Question number: 480
Question
There are 54 green apples and 30 more red apples than green apples in a container. What is the ratio of the number of red apples to the total number of apples?
Choices
Choice (4)  Response  

a.  5: 9 

b.  5: 14 

c.  14: 23 

d.  23: 14 

Question number: 481
Question
The total cost of 6 tables and 4 chairs is Rs. 1250. If one table costs Rs. 30 more than one chair, find the price of each table and chair respectively.
Choices
Choice (4)  Response  

a.  Rs. 137, Rs. 107 

b.  Rs. 167, Rs. 127 

c.  Rs. 145, Rs. 125 

d.  Rs. 130, Rs. 120 

Question number: 482
Question
Equal sums of Rs. 7200 were lent to Megha and Priya at 5 % per annum for a period of 4 years and 5 years respectively. Find the difference of the interest paid by Megha and Priya.
Choices
Choice (4)  Response  

a.  Rs. 560 

b.  Rs. 140 

c.  Rs. 260 

d.  Rs. 360 
