3n or Not is a game to quickly discrimination whether that number is a multiple of 3 or not.
Hard mode added.
Practice mode added.
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They made an iPhone game of my ocd compulsion. Look I am on the spectrum and have to see if numbers are good by adding them up and seeing if they can be divided by three (that means their good).
Apparently Im not the only one
With Family Sharing set up, up to six family members can use this app.