Q31. 
In a house, there are dogs, cats and parrot in the ratio $3:7:5$. If the number of cats was more than the number of dogs by a multiple of both 9 and 7, what is the minimum of pets in the house? 
A.  945 

B.  630 

C.  252 

D.  238 
Q32. 
A fort has provisions for 60 days. If after 15 days 500 men strengthen them and the food lasts 40 days longer, how many men are there in the fort? 
A.  3500 

B.  4000 

C.  6000 

D.  None 