Variations on the Odd One Out (OOO)

I often include One Out Out (OOO) actvities at AS/A Level. Too often we stop using these after GCSE level but I find they are very useful to test learning and to iniatiate discussion in class. I would like to thank Mike Fleetham for providing me with these ideas. Mike's Thinking Classroom website can be found at:
http://www.thinkingclassroom.co.uk/
Variations on the Odd One Out (OOO):

Odd All Out – give a different reason for why each item could be the odd one out

Odd None Out – give a reason why there isn’t an odd one out

Odd One In – give a reason why the Odd One Out is more important/valuable that the others

Odd Two Out – from 5 or more items choose 2 items which are OOO for the same reason

Odd One First – use the reason for choosing the OOO to put the other items in order

Odd One More – after choosing your OOO find other items that could be too

Odd One Less – Start with 5+ items. Remove the OOO. Repeat for the remaining and so on