Train A crosses a stationary train B in 35 seconds and a pole in 14 seconds with the same speed. The length of the train A is 280 metres. What is the length of the stationary train B?

The average of nine consecutive odd numbers is 53. The least odd number is: 

A house worth Rs.1,50,000 is sold by X at a 5% profit to Y, Y sells the house back to X at a 2% loss. Then find profit and loss in the entire transaction. 

The age of Shipra can be obtained by subtracting three times her age 3 years ago from the three times her age after 3 years. What will her age after 2 years?

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

A bike is sold for ₹87,500 by allowing a discount of 44% on its marked price. The marked price (in ₹) of the bike is: 

Mohan gets 3 marks for each correct sum and loses 2 marks for each wrong sum. He attempts 30 sums and obtains 40 marks. The number of sums solved correctly is:

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 ?