## Which One Doesn’t Belong?

I like Odd-One-Out puzzles that are ambiguous. That is why I bought the book *Which One Doesn’t Belong?* Look at the cover: which is the odd one out? The book doesn’t include answers, but it has nine more examples in each of which there are several possible odd-one-outs.

## Jo in OKC:

The teachers book for this is great. It looks like you got the student book.

25 May 2017, 2:51 pmThe biggest challenge is to find a reason each one of the 4 things doesn’t belong.

Some sample reasons for the cover shapes

* Top Left: Is a regular hexagon.

* Top right: Is concave. All others are convex. Also, can be divided into 3 squares. Every angle is a right angle.

* Bottom Left: Every side is a different length

* Bottom Right: Has 5 sides/is a pentagon. All others have 6.

## Al Yunani:

Nice one, Tanya!

26 May 2017, 7:08 amI would guess that the “odd” depends very much on one’s background and nature. I would bet that a painter or artist in general, would reply with no hesitation bottom left, since it is the only “ugly” one. Mathematical interpretation of “ugly” :the only one without an axis of symmetry. Symmetry is important! More important than concavity. ðŸ™‚