Kai is on his summer break from university and is working some extra hours to pay for a holiday with his friends.
Kai worked for a total of 36 hours last week.
On Monday, Tuesday and Wednesday, he worked the same number of hours each day.
On both Thursday and Friday, he worked for half as long as he did on any of the first three days.
Kai had the weekend off and did not work on Saturday or Sunday.
How many hours did Kai work for on Friday?
Answer:
Let the number of hours worked on Monday be x
The number of hours worked on Friday is therefore x/2
Since the total number of hours worked is 36
36 = x + x + x + x/2 + x/2 for each of the respective days
36 = 4x
X = 9
Since the hours worked on Friday are x/2
Kai worked 4.5 hours on Friday.