Spot the one that does not belong

Exercise and reference answers

Questions

1. Items

   1. Quantity and cost
   2. Distance and time at fixed speed
   3. Workers and time

   Odd item

   Workers and time

2. Items

   1. xy = k
   2. x/y = k
   3. x₁/y₁ = x₂/y₂

   Odd item

   xy = k

3. Items

   1. Speed and time
   2. Items and price
   3. Workers and time

   Odd item

   Items and price

Explanation