Spot the one that does not belong

Exercise and reference answers

Questions

1. Items

   1. Adding workers
   2. Adding a shift
   3. Adding a second wall

   Odd item

   Adding a second wall

2. Items

   1. Days alone
   2. Worker-days
   3. Total work

   Odd item

   Days alone

3. Items

   1. More workers, fewer days
   2. More hours, more wages
   3. More taps, less time

   Odd item

   More hours, more wages

Explanation