Playing With Numbers (IMO Mathematics Olympiad Class 8): Questions 24  31 of 61
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Question number: 24
» Playing With Numbers
Question
The number which is divisible by 5 is________.
Choices
Choice (4)  Response  

a.  12345 

b.  24675 

c.  21300 

d.  All a. , b. and c. are correct 

Question number: 25
» Playing With Numbers
Question
Find the least value of x for which 7x5462 is divisible by 9.
Choices
Choice (4)  Response  

a.  5 

b.  3 

c.  2 

d.  4 

Question number: 26
» Playing With Numbers
Question
When a certain number is multiplied by 13, the product consists entirely of fives. The smallest such number is________.
Choices
Choice (4)  Response  

a.  4273 

b.  4271 

c.  4275 

d.  4256 

Question number: 27
» Playing With Numbers
Question
If is divided by 5 leaves a remainder of 4, then one’s digit of must be________.
Choices
Choice (4)  Response  

a.  Either 9 or 4 

b.  Either 1 or 4 

c.  Either 5 or 4 

d.  All of the above 

Question number: 28
» Playing With Numbers
Question
If the 3digit number 14x is divisible by 9, then the value of x is________.
Choices
Choice (4)  Response  

a.  2 

b.  5 

c.  3 

d.  4 

Question number: 29
» Playing With Numbers
Question
If and there is no carry on addition, then the value of B is________.
Choices
Choice (4)  Response  

a.  3 

b.  1 

c.  7 

d.  5 

Question number: 30
» Playing With Numbers
Question
The number is divisible by 11 for________.
Choices
Choice (4)  Response  

a.  Even value of n 

b.  For all Naturals numbers 

c.  Odd value of n 

d.  None of the above 

Question number: 31
» Playing With Numbers
Question
213456 is divisible by________.
Choices
Choice (4)  Response  

a.  2 

b.  7 

c.  5 

d.  Question does not provide sufficient data or is vague 
