IMO Mathematics Olympiad (SOF) Class 9: Questions 650  657 of 919
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Question number: 650
Question
If then =
Choices
Choice (4)  Response  

a.  4 

b.  2 

c.  3 

d.  1 

Question number: 651
» Analytical Reasoning and Logical Reasoning
Question
If , and, then
Choices
Choice (4)  Response  

a.  60 

b.  85 

c.  144 

d.  120 

Question number: 652
» Linear Equations in Two Variables
Question
The number of ways of writing the number in the form (a, b are integers)
Choices
Choice (4)  Response  

a.  Finitely many 

b.  0 

c.  Infinitely many 

d.  1 

Question number: 653
Question
A class starts at 10 a. m. and lasts till 1.27 p. m. four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is ________
Choices
Choice (4)  Response  

a.  51 minutes 

b.  53 minutes 

c.  48 minutes 

d.  42 minutes 

Question number: 654
Question
The product of all the solutions of , is ________.
Choices
Choice (4)  Response  

a.  4 

b. 


c.  16 

d. 


Question number: 655
Question
The number of positive integers k for which the equation has an integer solution for x is ________
Choices
Choice (4)  Response  

a.  2 

b.  3 

c.  5 

d.  8 

Question number: 656
Question
The median of the observation 30,91,0, 64,42,80,30,5, 117,71 is ________
Choices
Choice (4)  Response  

a.  53 

b.  51 

c.  52 

d.  52.5 

Question number: 657
» Introduction to Euclid's Geometry
Question
In the figure y = 30˚, then ∠DOE is________ (Assume X = Y)
Choices
Choice (4)  Response  

a.  150˚ 

b.  30˚ 

c.  90˚ 

d.  60˚ 
