A and B started a business with their investments in the ratio 7 : 11. After four months, C joined them with an investment which is Rs.4,000 more than A's investment and he is the working partner who earns a monthly salary of Rs.1,200. The share of 'C' in the total profit of Rs.65,600 is Rs.22,400. What is the share of A?

There are three bottles of mixture of syrup and water of ratio 2 : 3,  3 : 4,  7 : 5. 10 Litres of first and 21 Litres of second bottles are taken. How much quantity from third bottles is to be taken so that final mixture from three bottles will be of ratios 1 : 1. 

Jack sold a dress for Rs.1440 and made a profit of 20%. What was its cost? 

What sum will give Rs. 488 as the difference between simple interest and compound interest at 10% in $$ 1{1\over2}$$ years compounded half yearly ?

If the seven-digit number 52A6B7C is divisible by 33, and A, B, C are primes, then the maximum value of 2A + 3B + C is:

What approximate values should come in place of the question mark(?) in the following question?