IMO Mathematics Olympiad Class 6: Questions 231  238 of 1049
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Question number: 231
Question
HCF of the two numbers =
Choices
Choice (4)  Response  

a.  Product of numbers × their LCM 

b.  Product of numbers  their LCM 

c.  Product of numbers + their LCM 

d.  Product of numbers ÷ their LCM 

Question number: 232
Question
Which of the following is the pair that is not twin primes?
Choices
Choice (4)  Response  

a.  (5, 7) 

b.  (11, 13) 

c.  (17, 19) 

d.  (23, 29) 

Question number: 233
Question
Product of two integer is If one of the integers is , then the other is
Choices
Choice (4)  Response  

a.  0 

b.  8 

c.  1 

d.  28 

Question number: 234
Question
The least number of square tiles that will be needed to pave a plot 225 m by 30 m is
Choices
Choice (4)  Response  

a.  45 tiles 

b.  15 tiles 

c.  30 tiles 

d.  25 tile 

Question number: 235
Question
The number (67, 54) are
Choices
Choice (4)  Response  

a.  prime and coprime 

b.  Prime numbers 

c.  Coprime numbers 

d.  Question does not provide sufficient data or is vague 

Question number: 236
Question
The number 11284 and 7655 when divided by a certain 3 digit number leave the same remainder. Find the number and the remainder
Choices
Choice (4)  Response  

a.  190, 14 

b.  180, 20 

c.  191, 15 

d.  195, 25 

Question number: 237
Question
The integer which is 5 less than is
Choices
Choice (4)  Response  

a.  8 

b.  9 

c.  13 

d.   15 

Question number: 238
Question
The number (9, 8) are
Choices
Choice (4)  Response  

a.  Coprime numbers 

b.  Prime numbers 

c.  Prime and coprime 

d.  All of the above 
