today, in this short post I want to show you this cool puzzle that I first encountered on my summer camp. The problem goes like this:
You have got 12 coins. One of them may be false one. You can not know by looking but you have a balance weights. You are allowed to use it 3 times and find out which one of the coins is heavier or lighter (you do not know and it might happen that none is).
I really recommend you to try it out. I almost had a solution though when I checked it I saw that I had mistake in one of the scenarios. Try it out for yourself and in next post I will reveal the solution.
Try to take first step of weighting 4 coins against 4 coins, it will help you 😉