MathematicsMultiples and Factors (NSTSE (National Science Talent Search Exam Unified Council) Class 4): Questions 78  85 of 99
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Question number: 78
» Mathematics » Multiples and Factors
Question
The greatest prime number less than 240 is:
Choices
Choice (4)  Response  

a.  233 

b.  237 

c.  239 

d.  241 

Question number: 79
» Mathematics » Multiples and Factors
Question
A number is divisible by 9, if the sum of its digits is divisible by:
Choices
Choice (4)  Response  

a.  9 

b.  0 

c.  7 

d.  Question does not provide sufficient data or is vague 

Question number: 80
» Mathematics » Multiples and Factors
Question
LCM of 12,18 is:
Choices
Choice (4)  Response  

a.  72 

b.  36 

c.  54 

d.  48 

Question number: 81
» Mathematics » Multiples and Factors
Question
________ is composite number.
Choices
Choice (4)  Response  

a.  23 

b.  19 

c.  12 

d.  17 

Question number: 82
» Mathematics » Multiples and Factors
Question
The number 10 has 4 factors. The table below lists the number of factors for some numbers. (Model Test Paper)
Number  Number of factors 
11  2 
13  2 
15  4 
17  2 
19  2 
From this we can say that the number of prime numbers between 10 and 20 is:
Choices
Choice (4)  Response  

a.  4 

b.  Can’t say 

c.  0 

d.  2 

Question number: 83
» Mathematics » Multiples and Factors
Question
What is the sum of the least common multiple and highest common factor of the numbers 12 and 18?
Choices
Choice (4)  Response  

a.  38 

b.  40 

c.  42 

d.  44 

Question number: 84
» Mathematics » Multiples and Factors
Question
Number 1 has only one factor. It is neither prime nor composite. It is called ________ number.
Choices
Choice (4)  Response  

a.  Twin prime 

b.  Prime 

c.  Unique 

d.  Composite 

Question number: 85
» Mathematics » Multiples and Factors
Question
Factors of 57: 3 and ________.
Choices
Choice (4)  Response  

a.  19 

b.  34 

c.  23 

d.  57 
