MathematicsPlaying With Numbers (NSTSE (National Level Science Talent Search Examination) Class 6): Questions 67  75 of 83
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Question number: 67
» Mathematics » Playing With Numbers
Question
The least number which when divided by 16, 18, 24 leaves in each case a remainder of 5 is
Choices
Choice (4)  Response  

a.  148 

b.  144 

c.  140 

d.  149 

Question number: 68
» Mathematics » Playing With Numbers
Question
The greatest number that will divide 162, 122 and 142 leaving a remainder of 2 in each case is
Choices
Choice (4)  Response  

a.  22 

b.  120 

c.  20 

d.  30 

Question number: 69
» Mathematics » Playing With Numbers
Question
The number 623273 is divisible by
Choices
Choice (4)  Response  

a.  5 

b.  7 

c.  All of the above 

d.  None of the above 

Question number: 70
» Mathematics » Playing With Numbers
Question
The HCF of 15, 20 and 30 is
Choices
Choice (4)  Response  

a.  5 

b.  20 

c.  15 

d.  10 

Question number: 71
» Mathematics » Playing With Numbers
Question
The LCM of two numbers is X and their HCF is Y. So, the sum of two numbers is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 72
» Mathematics » Playing With Numbers
Question
The number of prime numbers between 2 and 15 are
Choices
Choice (4)  Response  

a.  5 

b.  4 

c.  3 

d.  6 

Question number: 73
» Mathematics » Playing With Numbers
Question
Difference between a prime (18) and a composite (30) number is
Choices
Choice (4)  Response  

a.  19 

b.  23 

c.  12 

d.  30 

Question number: 74
» Mathematics » Playing With Numbers
Question
60 is written as the product of primes as
Choices
Choice (4)  Response  

a.  2 

b.  2 

c.  2 

d.  2 

Question number: 75
» Mathematics » Playing With Numbers
Question
Observe the following table of sum of odd numbers and multiplication of same pair numbers. Then find the sum of odd numbers from 1 to 29.
Choices
Choice (4)  Response  

a.  227 

b.  100 

c.  121 

d.  225 
