7.  Salaries of Ravi and Sumit are in the ratio 2 : 3. If the salary of each is increased by Rs. 4000, the new ratio becomes 40 : 57. What is Sumit’s salary?  
Answer: Option D Explanation:
Let the original salaries of Ravi and Sumit be Rs. 2x and Rs. 3x respectively.
57(2x + 4000) = 40(3x + 4000) 6x = 68,000 3x = 34,000 Sumit’s present salary = (3x + 4000) = Rs.(34000 + 4000) = Rs. 38,000. 
8.  If 0.75 : x :: 5 : 8, then x is equal to:  
Answer: Option B Explanation:

9.  The sum of three numbers is 98. If the ratio of the first to second is 2 :3 and that of the second to the third is 5 : 8, then the second number is:  
Answer: Option B Explanation:
Let the three parts be A, B, C. Then,

10.  If Rs. 782 be divided into three parts, proportional to : : , then the first part is:  
Answer: Option D Explanation:
Given ratio = : : = 6 : 8 : 9.
