GCSE Secondary Maths Age 13-17 - Number: Time Problems - Explained

The video tutorial explains a problem where Davos, a cleaner, needs to clean four rooms in a house and take a break, starting at 9:00 AM. The task is to determine if he will finish by 4:00 PM. The tutorial walks through the process of calculating the total cleaning time, including converting minutes to hours, and concludes that Davos will finish at 4:10 PM. The video emphasizes the importance of showing all work for full marks.

What is the total time Davos plans to spend cleaning all four rooms?

• 7 hours and 10 minutes

• 6 hours and 45 minutes

• 8 hours and 20 minutes

• 5 hours and 55 minutes

How long is Davos's break in hours and minutes?

• 1 hour and 25 minutes

• 1 hour and 35 minutes

• 1 hour and 15 minutes

• 1 hour and 5 minutes

What is the total time in hours and minutes after converting 130 minutes?

• 1 hour and 50 minutes

• 2 hours and 10 minutes

• 2 hours and 20 minutes

• 2 hours and 30 minutes

At what time does Davos finish cleaning according to the 24-hour clock?

• 15:50

• 16:20

• 16:00

• 16:10

What is the final conclusion about Davos's cleaning schedule?

• He finishes after 4:00 PM.

• He finishes before 4:00 PM.

• He finishes at 5:00 PM.

• He finishes exactly at 4:00 PM.

How many marks are awarded for the final conclusion in the question?

• Three marks

• Four marks

• Two marks

• One mark

What is the importance of showing all working in the problem?

• To ensure accuracy

• To get partial credit

• To avoid penalties

• To receive full marks