Quantitative Aptitude - Arithmetic Ability Questions

For the inequation x^2–7x + 12 > 0, which one of the following is correct ?

What is the value of cosec -7π/6?

Find the least number to be added to 1739 so that it is exactly divisible by 11.

Of the 5 numbers whose average is 78, the first is 2/11 times the sum of other 4. The first number is

Mahmood can do a piece of work in 40 hours. If he is joined by Janaki who is 50% more efficient, in what time will they together finish the work?

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

The distance between the points (2, 7) and (k, -5) is 13. What is the value of k?

The area of a square is 72.25 cm². Find its perimeter (in cm).