Spot the intruder

Exercise and reference answers

Questions

1. Items

   1. Oxygen
   2. Fuel
   3. Heat
   4. Match box

   Odd item

   Match box

2. Items

   1. Wind
   2. Solar
   3. Hydro
   4. Coal

   Odd item

   Coal

3. Items

   1. Goggles
   2. Gloves
   3. Scissors
   4. Knife

   Odd item

   Knife

Instructions

Three belong together. Tap the one that does not.