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Logic Thinking Riddle

Logic Thinking Riddle - 20 July

I have a clock(12 hour format) and both the needles of clock overlaps at 12:00.

After how much time, they will overlap again ?

For Solution : Click Here

10 comments:

  1. Will overlap at many stages
    clock timing when they will overlap again
    01.05
    02.10
    03-15
    04-20
    05-25
    06-30
    07-35
    08-40
    09-45
    10-50
    11-45
    and last again on 12 o'clock

    ReplyDelete
    Replies
    1. The overlap does not happen exactly on 3-15, 4-20 or 5-25 and so on. For example at 3-15 the minute hand will be at 3 but the hour hand will move little ahead of 3. Same way at 6-30, the hour hand will be ahead of the minute hand, not overlapping. Formula for exact time for overlap is: 12n/11 n

      Delete
  2. Replies
    1. wrong answer.
      after 1 hour and 5 minutes.

      Delete
  3. 1st time 01:05:04
    Generalised solution is 12n/11 n={1,2,3...}

    ReplyDelete
  4. just after 1/999999999999 th seconds

    ReplyDelete
  5. After one Hour fifty minutes

    ReplyDelete
  6. after 1 hour and five minutes.

    ReplyDelete