Spot the odd one out

Exercise and reference answers

Questions

1. Items

   1. Copper
   2. Silver
   3. Sulphur
   4. Gold

   Odd item

   Sulphur

2. Items

   1. Bromine
   2. Iodine
   3. Carbon
   4. Mercury

   Odd item

   Mercury

3. Items

   1. Brass
   2. Bronze
   3. Iodine
   4. Steel

   Odd item

   Iodine

Instructions

Tap the one that does not belong with the rest.

Explanation