2A Math Support Programme Session 3

15 workers take 3 days to build a house.

Calculate the number of workers needed to build the same house in 1 day.

8 students take 4 days to complete a project.

How many students are needed to complete the same project in 2 days?

10 students take 5 days to clean the classroom.

Find the number of students required to clean the same classroom in 2 days.

A building can be completed in 120 days with 50 workers. Assuming that all the workers work at the same rate, find how many workers are required to complete the building in 100 days.

Given that y is directly proportional to x, when x = 3, y = 18. Write down the equation connecting y and x.

Given that y is directly proportional to x, when x = 5, y = 15. Write down the equation connecting y and x.

Given that y is directly proportional to x, when x = 8, y = 12. Write down the equation connecting y and x.

q is directly proportional to p.

When p = 4, q = 20.

Write down the equation connecting q and p.

Each interior angle of a regular polygon is 140 degrees.

Find the size of each exterior angle.

Each interior angle of a regular polygon is 135 degrees.

Find the size of each exterior angle.