Mastermind is a game where you have to guess the order of 4 colours. You can put in any order you want, it will tell you if you have the colour in the right spot, or if you have the correct one but in the wrong spot. But it wont tell you which one, you have 10 tries to get it right.

Some strategies that can be used to win the game is rearranging the colours, or switching the order of colours that you think is right.

I think the game uses deductive reasoning due to the fact you have to deduct where and which slot you have to put the colours.