Suresh started a business, investing Rs. 18000. After 3 months and 4 months respectively, Rohan and Sudhir joined him with capital of Rs. 12000 and Rs. 9000. At the end of the year the total profit was Rs. 3982. What is the difference between Rohan's and Sudhir's in the profit ?

The dfference between the compound interest and the simple interest on a sum for 3 years at 10% interest per annum is equal to Rs. 37.20. What is the sum ?

Sumit decided to clear all his dues thrrough cheque. His total dues was Rs. 40000. He clears it thrrough cheque by paying Rs. 42628. What per centage service tax was charged by the bank ?

If the numerator and denominator of a fraction are increased and decreased by 40% respectively, the fraction becomes 14/15. What is the original fraction ?

The ages of Rohit and Niraj are in the ratio of 12 : 17. After 6 years the ratio of their ages will be 14 : 19. What is the sum (in yrs) of their present ages ?