Observation challenges – odd one out & spot the differences

A set of 40 observation challenges which require students (or adults!) to study images carefully. There are two different types of challenge:
One is odd one out – a set of three pictures, the challenge is to work out which has one difference from the other two.
The second is spot the difference -a set of two pictures , the challenge is to identify the six differences between each picture.
They are provided both on power point and in word document format.
They are suitable for use in a variety of settings -such as cover tasks, time fillers or in tutor time - even as a staffroom challenge.