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It's that time of the year again. Children are starting school and maths equations are being circulated around the internet.
A seemingly simple algebra question - with pictures! - is giving people pause.
Answers are wildly varied, with 22, 21 and 41 being popular contenders.
So let's break it down.
If we take:
The horse as X
The horeshoe as Y
The cowboy boots as Z
Method one is wrong, because it counts two horseshoes as one. As you can see in the final line, there is only one horseshoe, meaning all the other times there were two.