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OT Analog clock math problems

Posted By: Daniel Murphy
Date: Tuesday, 4 May 2010, at 4:59 a.m.

In Response To: OT Analog clock math problems (Jason Lee)

Re the seoond problem, an elegant proof eludes me, but my basic arithmetic tell me that although there are 44 times in 24 hours that the hour and minute hand are 120 degrees apart, at none of these times does the second hand point to a time exactly 20 minutes between the other.

Minute-hand intervals of 21.818181 minutes just won't match up with what's left after subtracting multiples of 60 from 1309.0909090 seconds.

I did find one near miss. At 2:54.545454 the second hand would have to point to 2:34.54545454 to solve, and it's close but no cigar -- it points to 2:32.72727272.

Messages In This Thread

• OT Analog clock math problems
  Jason Lee -- Monday, 3 May 2010, at 10:57 p.m.
  • OT Analog clock math problems
    Bob Koca -- Tuesday, 4 May 2010, at 12:11 a.m.
    • OT Analog clock math problems
      Sam Pottle -- Tuesday, 4 May 2010, at 12:24 a.m.
      • OT Analog clock math problems
        Bob Koca -- Tuesday, 4 May 2010, at 12:26 a.m.
  • OT Analog clock math problems
    Bob Koca -- Tuesday, 4 May 2010, at 12:14 a.m.
    • OT Analog clock math problems
      Timothy Chow -- Tuesday, 4 May 2010, at 12:20 a.m.
      • OT Analog clock math problems
        Sam Pottle -- Tuesday, 4 May 2010, at 12:25 a.m.
    • OT Analog clock math problems
      Jason Lee -- Tuesday, 4 May 2010, at 12:34 a.m.
  • OT Analog clock math problems
    Daniel Murphy -- Tuesday, 4 May 2010, at 2:19 a.m.
  • OT Analog clock math problems
    joe freedman -- Tuesday, 4 May 2010, at 2:22 a.m.
    • OT Analog clock math problems
      joe freedman -- Tuesday, 4 May 2010, at 2:34 a.m.
    • OT Analog clock math problems
      Jason Lee -- Tuesday, 4 May 2010, at 3:41 a.m.
  • OT Analog clock math problems
    Daniel Murphy -- Tuesday, 4 May 2010, at 4:59 a.m.
  • OT Analog clock math problems
    Bob Koca -- Tuesday, 4 May 2010, at 6:26 a.m.
    • OT Analog clock math problems
      Bob Koca -- Tuesday, 4 May 2010, at 6:31 a.m.
  • OT Analog clock math problems
    Nack Ballard -- Tuesday, 4 May 2010, at 11:17 a.m.
    • OT Analog clock math problems
      Nack Ballard -- Tuesday, 4 May 2010, at 5:22 p.m.
  • are we on the clock answering this?
    Chuck Bower -- Tuesday, 4 May 2010, at 1:38 p.m.
    • are we on the clock answering this?
      Timothy Chow -- Tuesday, 4 May 2010, at 3:56 p.m.
      • are we on the clock answering this?
        Chuck Bower -- Tuesday, 4 May 2010, at 7:22 p.m.
  • OT Analog clock math problems
    Tom Keith -- Tuesday, 4 May 2010, at 5:36 p.m.
  • OT Analog clock math problems
    storm -- Tuesday, 4 May 2010, at 6:26 p.m.
    • OT Analog clock math problems
      storm -- Tuesday, 4 May 2010, at 6:29 p.m.
      • OT Analog clock math problems
        Nack Ballard -- Tuesday, 4 May 2010, at 8:47 p.m.
        • OT Analog clock math problems
          Nack Ballard -- Wednesday, 5 May 2010, at 2:33 a.m.
  • OT Analog clock math problems
    Daniel Murphy -- Tuesday, 4 May 2010, at 6:47 p.m.