Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. 1
   2. 2
   3. 3
   4. 5

   Odd item

   5

2. Items

   1. 7
   2. 4
   3. 6
   4. 12

   Odd item

   7

3. Items

   1. 9
   2. 18
   3. 3
   4. 7

   Odd item

   7

4. Items

   1. 8
   2. 16
   3. 24
   4. 18

   Odd item

   18

Instructions

Tap the item that does not belong with the rest.

Explanation