IMO Level 1 Mathematics Olympiad (SOF) Class 8: Questions 121  130 of 1040
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Question number: 121
Question
Squares of an even numbers is always________.
Choices
Choice (4)  Response  

a.  Odd 

b.  Even 

c.  All of the above 

d.  None of the above 

Question number: 122
Question
If , then can be
Choices
Choice (4)  Response  

a.  13 

b.  12 

c.  11 

d.  15 

Question number: 123
Question
Square root of 2401 is________.
Choices
Choice (4)  Response  

a.  87 

b.  78 

c.  49 

d.  76 

Question number: 124
Question
A number is multiplied by itself and then 15 is subtracted from the product. If the final result is 2545, then find the original number.
Choices
Choice (4)  Response  

a.  30 

b.  31 

c.  13 

d.  32 

Question number: 125
Question
The area of a square field is sq. m. The length of each side of the field is ________.
Choices
Choice (4)  Response  

a.  2.00 

b.  2.50 

c.  4.00 

d.  1.92 

Question number: 126
Question
The number must be subtracted from 13245 to get a perfect square is________.
Choices
Choice (4)  Response  

a.  15 

b.  20 

c.  11 

d.  10 

Question number: 127
Question
Find the smallest square number which is exactly divisible by 15,25, and 30 is, ________
Choices
Choice (4)  Response  

a.  500 

b.  180 

c.  100 

d.  900 

Question number: 128
Question
The value of is________.
Choices
Choice (4)  Response  

a.  0 

b. 


c. 


d. 


Question number: 129
Question
If , then equals________.
Choices
Choice (4)  Response  

a.  4 

b.  1 

c.  3 

d.  2 

Question number: 130
Question
The value of is________.
Choices
Choice (4)  Response  

a.  2 

b. 


c. 


d.  Both b. and c. are correct 
