Sigh! There should really be some quality control on Cody, to save us from stupid problems like this...
The third element of aVec in the the image contained within your problem description does not match the third element of aVec used in the test suite.
Which values occur exactly three times?
Getting logical indexes
What number has this problem?
Area of an equilateral triangle
Remove the positive integers.
02 - Vector Variables 5
03 - Matrix Variables 2
04 - Scalar Equations 2
02 - Vector Variables 1
06 - Matrix Equations 1
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