IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 143  149 of 929
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Question number: 143
» Lines, Angles and Quadrilaterals
Question
In the given figure and, then value of x is________.
Choices
Choice (4)  Response  

a.  80˚ 

b.  85˚ 

c.  90˚ 

d.  95˚ 

Question number: 144
Question
Value of
Choices
Choice (4)  Response  

a.  1 

b.  0 

c.  x 

d.  1 

Question number: 145
» Lines, Angles and Quadrilaterals
Question
In the figure, find ________
Choices
Choice (4)  Response  

a.  120˚ 

b.  105˚ 

c.  100˚ 

d.  115˚ 

Question number: 146
» Lines, Angles and Quadrilaterals
Question
How many sides does a regular polygon have, each angle of which is of measure 150˚?
Choices
Choice (4)  Response  

a.  17 

b.  18 

c.  16 

d.  12 

Question number: 147
Question
If the product of two surds is a rational number, then each one of them is called the ________ of the other________
Choices
Choice (4)  Response  

a.  Rationalizing factor 

b.  Binomial surd 

c.  Conjugate surd 

d.  Negative 

Question number: 148
» Lines, Angles and Quadrilaterals
Question
If two complementary angles are in the ratio 4: 11, then the angles are________
Choices
Choice (4)  Response  

a.  30˚, 60˚ 

b.  61˚, 29˚ 

c.  24˚, 66˚ 

d.  56˚, 34˚ 

Question number: 149
» Lines, Angles and Quadrilaterals
Question
In a parallelogram, the sum of the angle bisectors of two adjacent angles is ________
Choices
Choice (4)  Response  

a.  60˚ 

b.  45˚ 

c.  90˚ 

d.  30˚ 
