NRA CGL (National Recruitment AgencyCombined Graduate Level) Mathematics: Questions 398  403 of 425
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Question number: 398
Question
In four consecutive prime numbers that are in descending order, the product of first three is 385 and that of the last three is 105. The largest given prime number is
Choices
Choice (4)  Response  

a.  7  
b.  11  
c.  2  
d.  5 
Question number: 399
Question
A, B and C are employed to do a work for Rs. 2565. A and C together finished of the work and B and C together finished of the work. Wage of C (In Rs) is
Choices
Choice (4)  Response  

a.  750  
b.  500  
c.  600  
d.  810 
Question number: 400
Question
LCM of , and is
Choices
Choice (4)  Response  

a.  210  
b.  220  
c.  420  
d.  840 
Question number: 401
Question
A, B and C are employed to do a work for Rs. 8000. A and C together finished of the work and B and C together finished of the work. Wage of C (In Rs) is
Choices
Choice (4)  Response  

a.  3200  
b.  5600  
c.  1500  
d.  900 
Question number: 402
» Average
Question
The average marks of 50 students in a test is 80. Later it is found that three marks 60,70 & 80 were wrongly entered as 62,72 & 82. The average marks after mistakes were rectified is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c.  71.6  
d.  79.98 
Question number: 403
Question
A man bought a secondhand typewriter for Rs. 1000 and spent Rs. 600 on its repairs. He sold it for Rs. 2000. His profit percent is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
