Four runners started running simultaneously from a point on a circular track. They took 200 seconds, 300 seconds, 360 seconds and 450 seconds to complete one round. After how much time do they meet at the starting point for the first time? 

The sum of a positive integer and its square is 2450. The positive integer is : 

The greatest number that can be subtracted from 10000 so that the remainder may be divisible by 32, 36, 48 and 54 is-

The largest number, which divides 25, 73 and 97 to leave the same remainder in each case, is 

There are four numbers in a set. The mean of the three smallest numbers is 9, whereas the mean of the three largest ones is 11. What is the range of the data set? 

Two numbers are less than the third number by 50% and 54% respectively. By how much per cent is the second number less than the first number? 

The 3rd and 8th term of an arithmetic  progression are 19 and 49 respectively. What is the 13th term?

Direction (94-98): Study the following table to answer the given questions.
         Centre and Post-wise Numbered of candidate

In Kolkata, number of Specialist Officers is approximately what percent of that of Officers?