IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 619  624 of 929
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Question number: 619
» Introduction to Euclid's Geometry
Question
In the figure , and, if , what is the length of ?
Choices
Choice (4)  Response  

a.  1 

b.  4 

c.  2 

d.  3 

Question number: 620
Question
Two dice are thrown simultaneously. The probability of getting a multiple of 2 on one die and a multiple of 3 on the other is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 621
Question
The age of Sandhya’s father is 5 times of his age. If 6 years ago, father’s age was 8 times of the age of his son at that time. What is Sandhya’s father present age?
Choices
Choice (4)  Response  

a.  56 years 

b.  70 years 

c.  75 years 

d.  41 years 

Question number: 622
Question
Give the equations of two lines passing through. How many more such lines are there?
Choices
Choice (4)  Response  

a.  Infinitely many 

b.  Exactly Two 

c.  Only one 

d.  Exactly three 

Question number: 623
Question
The following observations have been arranged in the ascending order. If the median of the data 13,26,32,37, x + 2, x + 4,62,68,74,85 is 43, then the value of x is ________
Choices
Choice (4)  Response  

a.  40 

b.  42 

c.  44 

d.  46 

Question number: 624
Question
The probability of guessing the correct answer to a certain test question is . If the probability of not guessing the correct answer to this question is , then x = ________
Choices
Choice (4)  Response  

a.  2 

b. 


c.  3 

d. 

