1. A man takes four times as long to row up as to row down the river. If the rate of river is 6 km/h, what is the rate of the man in still water?

5 km/h             
10 km/h           
8 km/h              
12 km/h            
15 km/h           

2.The ratio between the sale price and the cost price of an article is 7 : 5. What is the ratio between the profit and cost price of that article?

2:5        
5:2        
3:7        
7:3        
2:3       

3.Two persons 'A' and ' B ' stand in a ring with 7 other persons. If the arrangement of the 9 persons is done at random, then the probability that there are exactly 2 persons between 'A' and ' B ' is-

1/4    
1/5   
2/5   
2/3    
4/7    

4.An amount of money grows up to Rs 400 in 2 years and up to 560 in 3 years on compound interest. What is the rate percent?

40%            
38 %          
34%           
44%           
48%           

5.The average age of all the students of a class is 15 years. The average age of the boys of the class is 18 years, and that of the girls is 12 years. If the number of girls in the class is 21, then what is the number of boys in the class?

42                         
36                         
30                        
24                         
21                         

6. 279936 46656 7776 1296 ?

216       
206      
220     
224    
228    

7.576 1196 2016 3036 ?

4488                 
4368                 
4256                  
4552                 
4682                  

8. 13 94 30 79 ?

26          
43          
31         
54         
59        

9. 504 236 210 ? 60

110     
128     
120    
135    
140    

10.33 77 139 225 ?

275       
295      
341     
326    
358