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abdul_shabeer

A clock gains 2 minutes per day and another loses 3 minutes per day. Both the clocks are started on a correct time at a given instant. They will again show the correct time for an instant within

  • 2 years ago
  • 2 years ago

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  1. abdul_shabeer
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    (a) a week (b) a month (c) six months (d) one year

    • 2 years ago
  2. GT
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    I tried this before but could not formulate the equation. hmmmm....

    • 2 years ago
  3. 14yamaka
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    wait, is this a digital clock? like is it 12 hours or 24 hours we're going for?

    • 2 years ago
  4. abdul_shabeer
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    I think 12 hours clock

    • 2 years ago
  5. 14yamaka
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    one of the easier ways would be is to multiply to figure out the total number of minutes there are in the 12 hours and divide it by 5.

    • 2 years ago
  6. 14yamaka
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    Each day, the clocks have gain a 5-minute gap between each other, so how big does the gap have to be to become 12 hours :)

    • 2 years ago
  7. fewscrewsmissing
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    I would say... 720 minutes per 12 hours, so the 2 minutes clock will be accurate again in 720/2/2 days = 180 days, the -3 minutes clock in 720/3/2 = 120 days. LCM of 180 and 120 is 360, so once a year?

    • 2 years ago
  8. fewscrewsmissing
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    But it's late here so my ability to reason left hours ago =)

    • 2 years ago
  9. FoolForMath
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    Yes once a year is the correct answer.

    • 2 years ago
  10. GT
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    I think that is right......

    • 2 years ago
  11. abdul_shabeer
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    Yes, it matches the answer key

    • 2 years ago
  12. GT
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    Good way to set it up.

    • 2 years ago
  13. 14yamaka
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    oooohhh ok:) its 1:25 in the morning here :S lol

    • 2 years ago
  14. fewscrewsmissing
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    Haha where are you 14yamaka? It's 12:25am here.

    • 2 years ago
  15. 14yamaka
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    japan haha

    • 2 years ago
  16. FoolForMath
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    As we are giving away our local time it's 9:55 PM here.

    • 2 years ago
  17. 14yamaka
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    Where are you FSM?

    • 2 years ago
  18. 14yamaka
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    and where are you Fool?

    • 2 years ago
  19. abdul_shabeer
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    I think FFM is in India

    • 2 years ago
  20. FoolForMath
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    I am from India and FSM is from Australia.

    • 2 years ago
  21. fewscrewsmissing
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    Ah tis but early for you FFM :-P I'm in Perth, Australia.

    • 2 years ago
  22. amir.sat
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    after 3600 days

    • 2 years ago
  23. fewscrewsmissing
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    3600 days = 10 years o.O

    • 2 years ago
  24. 14yamaka
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    whoa, that's 10 years

    • 2 years ago
  25. abdul_shabeer
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    Why the 2 minutes clock will be accurate again in 720/2/2 days?

    • 2 years ago
  26. amir.sat
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    2 minute clock after 1800 days 3 minute clock after 1200 days

    • 2 years ago
  27. abdul_shabeer
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    Is it 1800 or 180?

    • 2 years ago
  28. amir.sat
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    1800

    • 2 years ago
  29. fewscrewsmissing
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    I've shown my reasoning above, I got 180 days. I don't know HOW it could be 1800 or 1200 days, can you elaborate amir.sat?

    • 2 years ago
  30. fewscrewsmissing
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    So...?

    • 2 years ago
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