If a, b and c are in GP and a^1/x=b^1/y=c^1/z. The value of 2y is?

In an examination in which full marks were 500. A got 25% more than C, C got 20% less than D. If A got 360 marks. What percentage of full marks was obtained by D ? 

How long will Ramesh take to run round a square park of edge 50 metres, if he runs at the rate of 18 km/hr?

If a batsman scored 120 runs which included 9 boundaries and 3 sixes, then what percent of his total score did he make by running between the wickets?

The number of employers working in a farm is increased by 25% and the wages per head are decreased by 25%. If it result in x% decreased in total wages, then the value of x is : 

The difference between the value of the number increased by 20 % and the value of the number decreased by 25 % is 36. Find the number. 

If the average of 11, 23 and x is 40, then what is the value of x?

The ratio of two numbers is 5 : 11. If both numbers are increased by 10, the ratio becomes 7 : 13. What is the sum of the two numbers?