Some workers are painting a hall with length, breadth and height of 45 m, 20 m and 6 m respectively. If they can paint 10 m^{2} area from one liters of paint, find the amount of paint required to paint the walls and ceiling of hall.

Train X takes 6 hours to travel from station A to station B, while train Y takes 3 hours to travel from station B to station A. If train X and Y starts at same time from stations A and B respectively, after what time will they cross each other? (Assume trains travel with uniform speed)

The graph below shows the profit (in crores) of two companies (A and B) for ten years. Find the profit of A in the year when combined profit was maximum.

Crystal picks a three digit number and subtract it from the same number after reversing order of its digits. If this difference is divided by 9, find the remainder.

A.

1

B.

2

C.

0

D.

Can not be determined without knowing exact number

For the school assembly, the students are made to stand so that the number of rows is equal to the number of students in each row. If there are 77 rows, how many students were present at the assembly?