The average weight of 5 men is increased by 4 kg. If one of them who weigh 121 kg is replaced by another man, then what is the weight of the new man? 

The value of   $$ {(0.03)^2 - (0.01)^2}\over 0.03-0.01 $$

A, B and C complete a work in 10, 12 and 15 days respectively. They started the work together. But A left the work before 5 days of its completion. B also left the work 2 days after A left. In how many days will the work completed? 

Of the three numbers, the sum of the first two is 55, sum of the second and third is 65 and sum of third with thrice of the first is 110. The third number is: 

3 men or 5 women can complete a work in 12 days. Accordingly, how much time will it take for 6 men and 5 women to do the same work?

The diagonals AC and BD of a cyclic quadrilateral ABCD intersect each other at the point P. Then, it is always true that 

Three circles of radius 3.5 cm each are placed in such a way that each touches the other two. The area of the portion enclosed by the circles is 

Direction : What should come in place of the question (?) in the following question.

12 × 3.5 – 8.5 × 3.2 =?