An aeroplan covers a certain distance at a speed of 240 km/hour in 5 hours. To cover the same distance in   $$ 1{2\over3} $$ hours it must travel at a speed of: 

A principal increases by 21% over 2 years with compound interest. What will be the simple interest in 4 years at the same interest rate of Rs 1000?

The following line graph gives the percentage of the number of candidates who qualified an examination out of the total number of candidates who appeared for the examination over a period of seven years from 1994 to 2000.

The difference between the percentage of candidates qualified to appeared was maximum in which of the following pairs of years?

$$ {\sqrt{784}} × \sqrt{6.25} + 56\%\ of\ 450=?+186$$

If a man estimates his loss as 20% of the selling price, then his loss percent is:

Profit obtained on selling an article for Rs 540 is equal to the loss incurred on selling the article for Rs 370. if selling price is Rs. 910, Then what is the profit percentage? 

The sum of three consecutive odd natural numbers each divisible by 3 is 63. What is the largest among them?