IMO Level 1 Mathematics Olympiad (SOF) Class 10: Questions 246  250 of 968
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Question number: 246
Question
If the roots of the equation are equal. Then ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 247
Question
One of the two students, while solving a quadratic equation in x, copied the constant term incorrectly and got the roots 2 and 8. The other copied the constant term and coefficient of correctly as and respectively. The correct roots are
Choices
Choice (4)  Response  

a. 


b.  9,1 

c. 


d. 


Question number: 248
Question
The roots of the equation can be found by solving ________
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Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 249
Question
A convex polygon has 170 diagonals. The number of its sides is ________
Choices
Choice (4)  Response  

a.  40 

b.  50 

c.  20 

d.  30 

Question number: 250
Question
In the Maths Olympiad of 2016 at X Planet, two representatives from the Alex’s side, while solving a quadratic equation, committed the following mistakes:
 One of them made a mistake in the constant term and got the roots as 10 and 15.
 Another one committed an error in the coefficient of x and he got the roots as 9 and 8
But in the meantime, they realized that they are wrong and they managed to get it right jointly. Find the quadratic equation.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

