In the given figure, the ratio of the area of the largest square to that of the smallest square is:

A train travels the distance between station P and Q at a speed of 126 km/h, while in the opposite direction it comes back at 90 km/h. Another train travels the same distance at the average speed of the first train. The time taken by the second train to travel 525 km is:

The difference between the selling prices of some articles if sold for Rs.12 per article instead of Rs.9 per article is Rs.150. If the sold price of these articles is Rs.250 then find the selling price of 21 articles if profit earned is 20%.

 If x+y=14: x³+y³=1064, then the value of (x-y)² is:

A crate of fruits contains one spoiled fruit for every 25 fruits. 60 % of the spoiled fruit were sold. IF the seller had sold 48 spoiled fruits, then the number of fruits in the crate were:

A vessel contains 20 litres of acid. 4 is taken out of the vessel and replaced by the same quantity of water. Next 4 litres of the mixture are withdrawn, and again the vessel is filled with the same quantity of water. Then find the ratio of acid left in the vessel with the quantity of acid initially in the vessel is:

A vessel contains 60 litres of milk. 12 litres of milk taken out from it and replaced with water. Then again form mixture, 12 litres is taken out and replaced with water. The ratio of milk and water in the resultant mixture is :

If 8, X and 50 are in continued proportion, then the value of x is