1.

Which one of the following sets has contained all the factors of 40?

A.  {1, 2, 3, 4, 5, 8, 20, 40}
B.  {1, 2, 4, 5, 8, 10, 40}
C.  {1, 2, 4, 5, 8, 10, 20}
D.  {1, 2, 4, 5, 8, 10, 20, 40}
E.  None of these
Answer» E.  None of these


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