A man buys a table and a chair for 500. He sells the table at a loss of 10 % and the chair at a gain of 10 %. He still gain ₹10 on the whole. The cost price of chair in rupees is 

A worker suffers a 20% cut in his wage. He may regain his original wages by obtaining a rise of how much %?

A bag contains 30 balls, numbered 1 to 30. Two balls are drawn at random. What is the probability that the balls drawn contain a number which is multiple of 4 or 6 but not a multiple of both?

A train 270 meters long is running at a speed of 36 km per hour then it will cross a bridge of length 180 meters in : 

Ram started a business with a sum of Rs 600. After 3 months Shyam and after 6 months Mohan also become partners. If the profit at the end of the year was divided in the ratio of 4: 5: 3, then how much was Shyam's capital more than Mohan's capital.

The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average one number, namely 36, was wrongly read as 26. The correct average is: 

A person goes to his office by scooter at the speed of 80 km/hr and reaches 60 minutes earlier. If he goes at the speed 50 km/hr, then he reaches 48 minutes late. What will be the speed of the scooter to reach on the usual time?