[ww-bugs] Bug 3468: New: Error in parts (c) and (d) of this problem.

[bugzilla-daemon at webwork.maa.org]

http://bugs.webwork.maa.org/show_bug.cgi?id=3468

           Summary: Error in parts (c) and (d) of this problem.
           Product: Problem libraries
           Version: unspecified
          Platform: PC
               URL: /opt/webwork/courses/201-921-TITCOMBE/templates/Librar
                    y/Rochester/setDiscrete6Integers/ur_dis_6_13.pg_with_p
                    roblemSeed=1234
        OS/Version: Windows
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Library (OPL)
        AssignedTo: jj at asu.edu
        ReportedBy: mtitcombe at champlaincollege.qc.ca
        Web browser Firefox
           version:
    Browser version 40.0.3
            number:


/Library/Rochester/setDiscrete6Integers/ur_dis_6_13.pg

Using seed=1234, part (c) is to find the six-bit 1s complement of -29 which is
100010. The question has 111111 as the "correct answer".
I believe the source of the problem is in this line of the code:
$c2 = substr($ab2, 26, 6);

Same sort of problem with part (d). Six-bit 1s complement of -17 should be
101110. Again the "correct answer" is found as 111111.

Parts (a) and (b) are fine.

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