A cloth merchant sold half of his cloth at a 40% profit. half of remaining at 40% loss and the rest was sold at the cost price. In the total transaction, his gain or loss will be

Find the greatest number which will exactly divide 200 and 320. 

Directions :- Read the given information carefully and answer the following questions.

There are four hostels i.e. A, B, C and D.

In hostel A: Number of boys are 120 and number of girls are 30% more than that of number of girls in

hostel B.

In hostel B: Number of boys are double than that of number of girls.

In hostel C: Number of boys are 100 more than that of boys in hostel A and total boys and girls in C is 1000.

In hostel D: Number of boys is 182 more than the number of boys in hostel A. Average of number of girls of hostel A and that of hostel D is 223.Number of boys in hostel D is 98 less that of boys in hostel B.

Difference between number of boys and girls in hostel D is what percent of difference between boys and girls in hostel B?

The ratio between the speed of a train and a car is 18:13 respectively. Also, a bus covered a distance of 480 kms in 12 hours. The speed of the bus is five-ninth the speed of train. How much distance will the car cover in 5 hours?

A and B started a business with their investments in the ratio 7 : 11. After four months, C joined them with an investment which is Rs.4,000 more than A's investment and he is the working partner who earns a monthly salary of Rs.1,200. The share of 'C' in the total profit of Rs.65,600 is Rs.22,400. What is the share of A?

Directions:Study the following table carefully to answer these questions:

Percentage of Marks obtained by six students in six subjects

Marks obtained by C in Maths are approximately what per cent of his total marks obtained in all the six subjects together ?

What approximate value should come in place of the question mark (?) in the following question? 
21.9714 × (8.8749 - 4.9393) = ?