least common multiple in Number Clues, 54
left hand, keeping on the maze wall, 61
Legal Logic mind game, 44–46
solution to, 96–97
letters
encoding numbers, 147
representing two numbers, 147–149
liquid silicon, freezing, 166
liquids, proportional mixing of, 63–64
local cost minima, escaping, 165
lottery balls, stuffed with numbered slips of paper, 12
lower bound, on the length of the optimal wordsnake, 172
lucky people, finding, 8
Lucky Roulette mind game, 42–43
solution to, 96