A vessel has 30 L of wine and 10 L of water. 4 L of mixture is taken out from the vessel and 4 L of water is added. This process is repeated one more time. The ratio of the quantity of wine left to the initial quantity of wine is

2 men and 3 women together or 4 men together can complete a piece of work in 20 days. 3 men and 3 women will complete the same work in

A man bought toffees at 6 for ₹1. How many toffees for ₹1 must he sell to gain 50%?

A sum of ₹16800 is divided into two parts. One part is lent at simple interest of 6% per annum and the other at 8% per annum. After 2 years the total sum received is ₹19000. The sum lent at 6% simple interest is

A sum of ₹221 is divided among X, Y and Z such that X gets ₹52 more than Y and Y gets ₹26 more than Z. The ratio of the shares of X, Y and Z respectively is

11 friends went to a hotel and decided to pay the bill amount equally. But 10 of them could pay only ₹60 each; as a result the 11th has to pay ₹50 extra than his share. Find the amount paid by him.

If on selling 12 notebooks a seller makes a profit equal to the selling price of 4 notebooks, what is his per cent profit?

The respective ratio between the present ages of Parag and Sapna is 21 : 19. Six years ago, the respective ratio between their ages was 9 : 8. How old is Lina, if her present age is 12 years less than Sapna's present age?

Samir drove at the speed of 45 km/h from home to a resort. Returning over the same route, he got stuck in traffic and took an hour longer, as he could drive only at 40 km/h. How many kilometres did he drive each way?