Technically the image isn’t trick photography but the gap in positioning makes you think the size of the missing wrench must be between and of an inch. It may be a form of trickery but could a student argue the missing wrench size is ? How would they justify the break in the pattern?
One of the wrenches is indeed missing. Would students think to mentally close the gap and consider the possibility that the first or last wrench in the sequence is missing? What would be those sizes?
The idea is to let students explore common denominators and the patterns they discover in this task.
I’ll let you know how it goes.