Question Video: Calculating Times and Dates That Are 24 Hours Later Mathematics

Noah was studying math, for the final exam, on Sunday morning at the time shown. After he looked at his watch, he said, “There are exactly 2 days till I start the final exam.” At what time will he start the exam?

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Video Transcript

Noah was studying math, for the final exam, on Sunday morning at the time shown below. After he looked at his watch, he said, “There are exactly two days till I start the final exam.” At what time will he start the exam?

We’re given four possible answers to choose from here. But before we look at those, let’s look at the question itself. There’s a lot of words to get through. Firstly, we’re told that Noah was studying math for a final exam. It’s not really important what exam he was studying for, but what is important is when he was studying. We’re told that it was on Sunday morning at the time shown below. This is talking about the clock face we can see. And if we read the time on the clock, we can see that it shows 9 o’clock. So, the first piece of information we know is that Noah starts studying on Sunday morning at 9 o’clock.

We’re then told that he looks at his watch. And after he done so, he says, “There are exactly two days till I start the final exam.” We can use this information to help us work out the time that he starts his exam. If we start at 9 o’clock on Sunday, one day later would be 9 o’clock in the morning on Monday, the next day. But Noah’s math exam is not the next day. It’s two days later. So, if we count on another day, we get to choose day morning at 9 o’clock. Now, only two of our answers show Tuesday, and they both show in the morning. But which one shows 9 o’clock?

This is tricky because both clock faces show a hand pointing to the 12 and another hand pointing to the nine, but the hands are swapped around. Which one is correct? We know that at 9 o’clock, it’s the minute hand that points to the 12 and the hour hand, which is the shorter hand, that points to the nine. Exactly two days after Sunday morning at 9 o’clock, it will be Tuesday morning at 9 o’clock.

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