In a long room are three doors. Behind each door one block is hanging from the ceiling. Behind the first door the block is made of concrete; behind the second door the block is made of hardwood; behind the third door the block is made of styrofoam. The rectangular base of each block is 5 cm by 6 ...

Bob was playing a popular adventure game on his computer, and he came across a Mastermind minigame. Here's the results of his first four guesses: Bob has never been great at solving logic puzzles on the spot, so he asked Alice what he should guess next. Alice is exceptionally good at logic puzzl...