MathematicsFactors and Multiples (NSTSE (National Science Talent Search Exam Unified Council) Class 5): Questions 17  24 of 84
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Question number: 17
» Mathematics » Factors and Multiples
Question
How many prime numbers are there from 1 to 50?
Choices
Choice (4)  Response  

a.  17 

b.  20 

c.  15 

d.  10 

Question number: 18
» Mathematics » Factors and Multiples
Question
The figure given shows 5 numbers. (Model Test Paper)
Which of the 5 numbers are the prime factors of 130?
Choices
Choice (4)  Response  

a.  3 and 10 

b.  2 and 3 

c.  10 and 13 

d.  2 and 13 

Question number: 19
» Mathematics » Factors and Multiples
Question
Identify an example for twin primes.
Choices
Choice (4)  Response  

a.  5, 9 

b. 


c.  21, 25 

d.  13, 15 

Question number: 20
» Mathematics » Factors and Multiples
Question
Which of the following numbers which have no common factor except 1?
Choices
Choice (4)  Response  

a.  Twin primes 

b.  Coprimes 

c.  Composite numbers 

d.  None of the above 

Question number: 21
» Mathematics » Factors and Multiples
Question
How many prime numbers are there from 1 to 100?
Choices
Choice (4)  Response  

a.  27 

b.  20 

c.  15 

d.  25 

Question number: 22
» Mathematics » Factors and Multiples
Question
Study the numbers given in the box.
Identify the number that is not a divisor of the given numbers.
Choices
Choice (4)  Response  

a.  39 

b.  14 

c.  26 

d.  13 

Question number: 23
» Mathematics » Factors and Multiples
Question
How many times the H. C. F. of and 77 is their L. C. M. ?
Choices
Choice (4)  Response  

a.  44 

b.  3630 

c.  11 

d.  24 

Question number: 24
» Mathematics » Factors and Multiples
Question
Which of the following are multiples of 2?
Choices
Choice (4)  Response  

a.  Composite number 

b.  Odd number 

c.  Prime number 

d.  Even number 
