Which of the following is linear equation.

A number when divided by 296 gives a remainder 75. When the same number is divided by 37 the remainder will be: 

$$ \sqrt{0.00004761} $$   equal to

Direction: The following table represents the number of items sold by four divisions of a consumer goods dealer during 2010 to 2013.

The combined sales figures in 2011 and 2013 of which division was the lowest?

If there are four lines in a plane, then what cannot be the number of points of intersection of these lines? 

A and B together can complete a particular task in 4 days. If A alone can complete the same task in 6 days, how many days will B take to complete the task if he works alone? 

 Pipe A alone & pipe B alone can fill the same tank in 5 hours and 4 hours respectively. If the ratio of efficiency of pipe A & B together to that of pipe C alone is 9:2, then find time taken by pipe C alone to fill the same tank?

Find the greatest number which divides 108, 124 and 156, leaving the same remainder.