There are 60 minutes in 1 hour.
This is a very important fact that you must learn.
This means that:
There are 30 minutes in ½ an hour (÷ 2)
There are 120 minutes in 2 hours (x 2)
There are 150 minutes in 2½ hours (add last two lines together)
If you're not sure about these, read them again and try to remember them! You will need this information for answering the questions.
When you think you've got it, move on to the questions.