IMO Mathematics Olympiad Class 9: Questions 123  127 of 919
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 919 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 450.00 or
Question number: 123
» Lines, Angles and Quadrilaterals
Question
In figure PQ, RS and TU are three lines concurrent at A. If ∠PAU = 6y˚, ∠QAS = 4y˚ and ∠RAT = 2y˚, the value of y is________
Choices
Choice (4)  Response  

a.  15 

b.  25 

c.  30 

d.  20 

Question number: 124
» Lines, Angles and Quadrilaterals
Question
The complementary angle of an angle is one fourth of itself. Then the angle of its complement are________
Choices
Choice (4)  Response  

a.  45˚, 45˚ 

b.  72˚, 18˚ 

c.  60˚, 30˚ 

d.  55˚, 35˚ 

Question number: 125
» Lines, Angles and Quadrilaterals
Question
The angles of a triangle are in the ratio . The triangle is ________
Choices
Choice (4)  Response  

a.  Isosceles 

b.  Acute 

c.  Obtuse 

d.  Question does not provide sufficient data or is vague 

Question number: 126
» Lines, Angles and Quadrilaterals
Question
The given figure PQRS is a parallelogram then the values of and are________
Choices
Choice (4)  Response  

a.  45˚, 60˚ 

b.  70˚, 35˚ 

c.  35˚, 70˚ 

d.  60˚, 45˚ 

Question number: 127
» Lines, Angles and Quadrilaterals
Question
In the figure, a is greater than b by one fifth of a right angle. Then a, b respectively are________
Choices
Choice (4)  Response  

a.  120˚, 110˚ 

b.  50˚, 120˚ 

c.  130˚, 60˚ 

d.  99˚, 81˚ 
