MathematicsPlaying With Numbers (NSTSE (National Level Science Talent Search Examination) Class 6): Questions 23  31 of 83
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Question number: 23
» Mathematics » Playing With Numbers
Question
Number of prime numbers between 70 to 110 is
Choices
Choice (4)  Response  

a.  12 

b.  9 

c.  7 

d.  10 

Question number: 24
» Mathematics » Playing With Numbers
Question
Numbers of prime numbers from 1 to 100 are
Choices
Choice (4)  Response  

a.  25 

b.  20 

c.  15 

d.  18 

Question number: 25
» Mathematics » Playing With Numbers
Question
An odd number has ________
Choices
Choice (4)  Response  

a.  1, 3, 5, 7 or 9 at one’s place 

b.  2 factor only 

c.  2 multiplies only 

d.  0, 2, 4, 6 or 8 at one’s place 

Question number: 26
» Mathematics » Playing With Numbers
Question
The number 36 has________
Choices
Choice (4)  Response  

a.  6 factors 

b.  4 factors 

c.  3 factors 

d.  9 factors 

Question number: 27
» Mathematics » Playing With Numbers
Question
Example of an odd number from the following is
Choices
Choice (4)  Response  

a.  54658 

b.  875674 

c.  32444 

d.  35467 

Question number: 28
» Mathematics » Playing With Numbers
Question
By gold Bach’s conjecture, every odd number greater than 5 can be expressed as a sum of
Choices
Choice (4)  Response  

a.  Two odd prime number 

b.  Two composite number 

c.  Three primes 

d.  Two coprime number 

Question number: 29
» Mathematics » Playing With Numbers
Question
Which of the following are prime numbers?
Choices
Choice (4)  Response  

a.  124 

b.  198 

c.  197 

d.  All of the above 

Question number: 30
» Mathematics » Playing With Numbers
Question
Every number is a factor of zero (0) =
Choices
Choice (4)  Response  

a.  1 

b.  0 

c.  2 

d.  None of the above 

Question number: 31
» Mathematics » Playing With Numbers
Question
Brijesh wrote two digits of a 3digit number on the blackboard as shown below. Find the missing digit if it has 11 and 13 as factors?
2  ?  1 
Choices
Choice (4)  Response  

a.  3 

b.  4 

c.  2 

d.  8 
