Brain Teasers
Cryptic Time
Raine was trying to reset her watch clock one afternoon, after it had stopped running the day before. Even though she didn't know what the real time was, her father had given her a clue. "The right time is calculated by adding 1/4 of the time since noon today to 1/2 of the time till midnight tonight."
When her father told her this clue, she thanked him and set her watch correctly. What time was it?
When her father told her this clue, she thanked him and set her watch correctly. What time was it?
Hint
x = time since noon(12-x)= ?
Answer
4:48 pm.The time is divided up so x = the time in hours.
x = From noon till now
(12-x) = Time till midnight
Therefore, putting the clue into what we know, we get the equation:
x = 1/4 x + 1/2 (12-x)
Expand:
x = 1/4 x + 6 - 1/2 x
5/4 x = 6
x =24/5 = 4.8 hours or 4 hours 48 minutes.
Therefore, the time is 4:48 pm.
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Comments
i get so confused with times
Ignore the minutes part and just work with decimals until you get to the end and then convert.
Easy one. Explained well.
Nice one
Raine will have a problem if she cant figure out immediately the time with the clue her father gave her. Coz time keeps on ticking, and the clue will only be accurate the minute it was given to her.
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