NSTSE Class 5: Questions 391  399 of 977
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Question number: 391
» Mathematics » Factors and Multiples
Question
How many twin primes are there between 30 and 50?
Choices
Choice (4)  Response  

a.  9 

b.  10 

c.  5 

d.  8 

Question number: 392
» Mathematics » Factors and Multiples
Question
Find the L. C. M. of
Choices
Choice (4)  Response  

a.  24 

b.  72 

c.  108 

d.  36 

Question number: 393
» Mathematics » Factors and Multiples
Question
Find two common multiples of 15 and 20.
Choices
Choice (4)  Response  

a.  60, 120 

b.  20, 60 

c.  15, 30 

d.  75, 120 

Question number: 394
» Mathematics » Fractions
Question
By what number is lesser than ?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 395
» Mathematics » Factors and Multiples
Question
Which of the following are not multiples of 2?
Choices
Choice (4)  Response  

a.  Even number 

b.  Odd number 

c.  Prime number 

d.  Composite number 

Question number: 396
» Mathematics » Factors and Multiples
Question
P is the least common multiple of 20 and 40. What is the value of ?
Choices
Choice (4)  Response  

a.  1400 

b.  1800 

c.  1200 

d.  2000 

Question number: 397
» Mathematics » Factors and Multiples
Question
What is the L. C. M. of two coprime numbers?
Choices
Choice (4)  Response  

a.  Their difference 

b.  Their sum 

c.  Their quotient 

d.  Their product 

Question number: 398
» Mathematics » Factors and Multiples
Question
When a number Z is added to 7, the sum is divisible by 16. What could the number Z be?
Choices
Choice (4)  Response  

a.  21 

b.  13 

c.  25 

d.  32 

Question number: 399
» Mathematics » Fractions
Question
Find the difference obtained when is subtracted from .
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

