20030

Question

Lilly went to sleep at 10:50 pm.

She woke up at 8:35 am.

How long did Lilly sleep for?

Worked Solution

One possible strategy:

10:50 pm plus 1:10 gets to 12:00 midnight.

12:00 midnight plus 8:35 gets to 8:35 am.

∴ 1 hour 10 minutes + 8 hours 35 minutes

= 9 hours 45 minutes

Variant 0

DifficultyLevel

580

Question

Lilly went to sleep at 10:50 pm.

She woke up at 8:35 am.

How long did Lilly sleep for?

Worked Solution

One possible strategy:

10:50 pm plus 1:10 gets to 12:00 midnight.

12:00 midnight plus 8:35 gets to 8:35 am.

∴ 1 hour 10 minutes + 8 hours 35 minutes

= 9 hours 45 minutes

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
correctAnswer
9 hours 45 minutes

Answers

Is Correct?Answer
x

2 hours 15 minutes

✓

9 hours 45 minutes

x

9 hours 55 minutes

x

10 hours 45 minutes