Study the following information carefully to answer the questions.
The teachers' colony has 2800 members, out of which 650 members read only English newspaper. 550 members read only Hindi newspaper and 450 members read only Marathi newspaper. The number of members reading all the 3 newspapers is 100. Members reading Hindi as well as English newspapers are 200. 400 members read Hindi as well as Marathi newspaper and 300 members read English as well as Marathi newspaper.

Find the number of members reading Hindi newspaper.

If the two hands in a clock are 3 minutes divisions apart, then the angle between is

The average weight of three men is increased by 4 kg when one of them, whose weight is 100 kg, is replaced by another man. What is the weight of the new man? 

The simplified value of
$${{1\over 3}÷{1\over 3}×{1\over 3}\over{1\over 3}÷{1\over 3}of{1\over 3}}-{1\over 9}$$

0.1 and   $${5\over 8}$$ of a bamboo are in mud and water respectively and the rest of length 2.75 m is above water. What is the length of the bamboo? 

In triangle ABC, AD, BE and CF are the medians intersecting at point G and area of triangle ABC is 156 cm². what is the area (in cm²) of triangle FGE? 

The cost price of item B is Rs. 150/- more than the cost price of item A. Item A was sold at a profit of 10% and item B was sold at a loss of 20%. If the respective ratio of selling prices of items A and B is 11 : 12, what is the cost price of item B?

Ram does a work in 40 days and Shyam does same work in 60 days. If efficiency of Mohan is 20% less than the combined efficiency of Ram and Shyam together then working alone Mohan will complete the whole work in how many days?