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Taro Slept Well (illustration)
FILE No.150Unsolved

Taro Slept Well

Difficulty ★☆☆about 5 minEveryday MysteryTimesAM and PM
He went to bed at 3 and woke at 6, yet said he slept like crazy. Why?

Case Record

Taro suffers from insomnia. Last night he went to bed at 3 and got up at 6. When a friend asked, "What time did you go to bed last night?" he answered, "I slept like crazy last night!"

There is nothing wrong with Taro's sense of things.

Your question

Taro really did sleep for a long time. Why?

Case Files

Diagram

Taro's sleep last nightItemDetailWent to bed3 o'clockGot up6 o'clockHis comment"I slept so much yesterday!"His sense is fine: he really did sleep for a long time.
Diagram

Hints

If you get stuck, open the hints one at a time, in order.

Open hint 1

Is "3 o'clock" a.m. or p.m.?

Open hint 2

Does the problem hold with either "3 o'clock"?

Open hint 3

How many hours did he sleep?

Solve It

Your question

Taro really did sleep for a long time. Why?

Choose the answer closest to the truth.

Share: I'm solving this

The Truth

Went to bed at 3 p.m. and got up at 6 the next morning (15 hours)

The answer is "Went to bed at 3 p.m. and got up at 6 the next morning (15 hours)."

He said only that he "went to bed at 3 and got up at 6," without saying a.m. or p.m. If he went to bed at 3 p.m., he slept 15 hours until 6 the next morning.

From 3 a.m. to 6 a.m. would be only 3 hours.

"3 o'clock" need not be a.m.06121806121803 p.m. to 6 a.m.: 15 hours3 a.m. to 6 a.m.: 3 hoursHe never said a.m. or p.m. Going to bed at 3 p.m. means 15 hours until6 a.m.
Diagram of the solution

Key Points

  • Check a.m. and p.m.
  • Do not assume what was not said
  • Calculate the length of time

Why people get fooled

Because on hearing "3 o'clock," you assume it is 3 in the middle of the night.

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