IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 637  641 of 1022
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Question number: 637
» Practical Geometry  Lines and Angles
Question
The complement of an acute angle is ________angle.
Choices
Choice (4)  Response  

a.  A straight 

b.  Acute 

c.  Right 

d.  Obtuse 

Question number: 638
Question
In a jungle, total animals are 240. The number of elephants is of the number of other animals. How many elephants are there in the jungle?
Choices
Choice (4)  Response  

a.  40 

b.  100 

c.  60 

d.  50 

Question number: 639
Question
Two buses start at the same point on a straight highway facing opposite directions. Each bus drives 5 miles take a left turn and drives 12 miles. How far apart are the two buses?
Choices
Choice (4)  Response  

a.  26 miles 

b.  30 miles 

c.  24 miles 

d.  21 miles 

Question number: 640
Question
The three angles of a triangle are in the ratio 2: 4: 2, then the greatest angle is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 641
» Practical Geometry  Lines and Angles
Question
In the figure (not drawn to scale), ABCD is rhombus and BD is diagonal. Find .
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

