Following chart shows marks obtained by students in Geography examination. If first division is awarded for 60 or above marks, find the number of students who did not get first division in the exam.

There are 41 employees in a company, who work in three shifts. The first group of 6 employees work from 10:00 AM to 02:00 PM. The second group of 16 employees work from 12:00 PM to 03:00 PM. The third group of 19 employees work from 02:00 PM to 03:00 PM. If there are only 9 computers, during what time are the computers likely to be used most?

Number of students in a college increases by 10% every year. If there are 8000 students in the college, find the number of students in college after 2 years.

Some workers are painting a hall with length, breadth and height of 50 m, 50 m and 8 m respectively. If they can paint 100 m^{2} area from one liters of paint, find the amount of paint required to paint the walls and ceiling of hall.

Tap A can fill a tank in 20 hours, while tap B can fill the same tank in 5 hours. If both taps are open together, how long will it take to fill an empty tank?

The graph below shows the temperature (in degrees Celsius) over 10 weeks in Singapore and Hong Kong. Find the difference in temperature of two cities in the week when difference is maximum.