Puzzled

Not a wonderful photo from a technical point of view. My brain is mince after what feels like 3 days of thinking about maths and the teaching of it! Took some time out to do some much needed re-organisation of my maths puzzle box then, realising the light was long gone so no chance of an outside picture thought I'd use this as subject matter.

And now see Blipfoto has turned it upside down!