Spot the odd one

Exercise and reference answers

Questions

1. Items

   1. Determinant
   2. Collinear
   3. Adjoint
   4. Inverse

   Odd item

   Collinear

2. Items

   1. Singular
   2. |A| = 0
   3. Invertible

   Odd item

   Invertible

3. Items

   1. Cofactor
   2. Row
   3. Column

   Odd item

   Cofactor

4. Items

   1. ½
   2. (−1)^(i+j)
   3. 1s in the last column

   Odd item

   (−1)^(i+j)

Explanation