IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 178  183 of 919
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Question number: 178
» Lines, Angles and Quadrilaterals
Question
If two complementary angles are in the ratio 13: 5, then the angles are________
Choices
Choice (4)  Response  

a.  15˚, 85˚ 

b.  65˚, 25˚ 

c.  13 x˚, 5 x˚ 

d.  65˚, 35˚ 

Question number: 179
Question
If a right triangle has sides of length 1 and , which of the following could be the length of the remaining side?

1


Choices
Choice (4)  Response  

a.  2 Only 

b.  1 And 3 Only 

c.  1 Only 

d.  3 Only 

Question number: 180
Question
If and x and y are positive integers, then y could be which of the following?
Choices
Choice (4)  Response  

a.  3 

b.  5 

c.  4 

d.  2 

Question number: 181
» Lines, Angles and Quadrilaterals
Question
In the figure, form a linear pair and . Then a, b respectively are________
Choices
Choice (4)  Response  

a.  70˚, 100˚ 

b.  80˚, 120˚ 

c.  110˚, 70˚ 

d.  120˚, 80˚ 

Question number: 182
Question
All the three quadrilaterals ADEC, ABIH and BCGF are squares and if the area of and area of, then find the area of BCGF?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 183
» Lines, Angles and Quadrilaterals
Question
If two supplementary angles are in the ratio 13: 5, then the angles is ________
Choices
Choice (4)  Response  

a.  130˚, 50˚ 

b.  125˚, 55˚ 

c.  145˚, 35˚ 

d.  120˚, 60˚ 
