The sum of the squares of three numbers is 532 and the ratio of the second and also of the second to the third is 3 : 2 . What is the second number?

A man crosses a diagonal of square in two minutes at the speed of 6 km./hr. Find the area of the square-

How many positive integers less than 1000 are multiples of 11 whose square roots are whole numbers

In the afternoon, a student read 100 pages at the rate of 60 pages per hour. In the evening, when she was tired, she read 100 more pages at the rate of 40 pages per hour. What was her average rate of reading the pages per hour? 

What value will come in the place of question mark in the following number series?
5 9 36 208 1398 ? 

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: 

Percentage of decrease in the number of accidents from May to June is:

A 300-meter-long train moving with an average speed of 126 km/hr. crosses a platform in 24 seconds. A man crosses the same the same platforms in 5 minutes. What is the speed of man in meter/second?