NRA CGL (National Recruitment AgencyCombined Graduate Level) Mathematics: Questions 414  419 of 425
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Question number: 414
Question
A and B working together take 7 and 28 less days than A alone and B alone respectively to do a work. The number of days taken by A and B working together to do the work is
Choices
Choice (4)  Response  

a.  10  
b.  11  
c.  14  
d.  12 
Question number: 415
» Surds
Question
The square root of is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 416
Question
In four consecutive prime numbers that are in descending order, the product of first three is 5083 and that of the last three is 1105. The largest given prime number is
Choices
Choice (4)  Response  

a.  11  
b.  23  
c.  17  
d.  19 
Question number: 417
Question
A man bought a secondhand typewriter for Rs. 3000 and spent Rs. 1000 on its repairs. He sold it for Rs. 6000. His profit percent is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 418
Question
In four consecutive prime numbers that are in descending order, the product of first three is 21793 and that of the last three is 6479. The largest given prime number is
Choices
Choice (4)  Response  

a.  5  
b.  11  
c.  37  
d.  23 
Question number: 419
» Average
Question
The distance between two stations P and Q is 500 km. A train starts from P and moves towards Q at an average speed of 20 km/hr. another train starts from Q at the same time and moves towards P at an average speed of 80 km/hr. How far from P will they cross each other?
Choices
Choice (4)  Response  

a.  600 km  
b.  100 km  
c.  525 km  
d.  350 km 