IMO Level 1 Mathematics Olympiad (SOF) Class 8: Questions 322  327 of 1040
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Question number: 322
» Quadrilaterals and Practical Geometry
Question
The exterior angle of a regular polygon is onefourth of its interior angle. How many sides has the polygon?
Choices
Choice (4)  Response  

a.  12 

b.  4 

c.  10 

d.  8 

Question number: 323
» Quadrilaterals and Practical Geometry
Question
To construct a convex quadrilateral which of the following cases is not correct?
Choices
Choice (4)  Response  

a.  When the lengths of four sides and one diagonal are given 

b.  When the lengths of three sides and the two diagonal given. 

c.  When the lengths of two sides and one angle are given. 

d.  When the lengths of two sides and two included angles are given. 

Question number: 324
» Quadrilaterals and Practical Geometry
Question
ABCD is a quadrilateral. If its diagonals are perpendicular bisectors of each other, then ABCD is________.
Choices
Choice (4)  Response  

a.  Rectangle 

b.  Rhombus 

c.  Square 

d.  Parallelogram 

Question number: 325
Question
If a number x is 15 % less than another number y and y is 15 % more than 110, then x is equal to________.
Choices
Choice (4)  Response  

a.  100.25 

b.  109.725 

c.  107.525 

d.  120 

Question number: 326
Question
The cost of a vehicle is Rs. 1,20,000. If its value depreciates at the rate of 10 % per annum then total depreciation after 2 years was________.
Choices
Choice (4)  Response  

a.  21100 

b.  22800 

c.  21000 

d.  22000 

Question number: 327
Question
The C. I. on a certain sum for 2 years is Rs. 410 and S. I. is Rs. 400. The rate of interest per annum is________.
Choices
Choice (4)  Response  

a.  6% 

b.  4% 

c.  5% 

d.  3% 
