Beginner puzzle This puzzle is intended to be suitable for people who are new to puzzle solving. Clarification: Both experienced solvers and new solvers are welcome to post solutions to this puzzle. In a room there are three people, a truth teller, a liar and a spy. The truth teller is always ho...

Find the next 4-letter word. ┌───┐┌───┐┌───┐┌───┐┌───┐┌───┐┌───┐│ ││ ││ ││ ││ ││ * ││ │└───┘└───┘└───┘└───┘└───┘└───┘└───┘┌───┐┌───┐┌───┐┌───┐┌───┐┌───┐┌───┐│ ││ ││ ││ ││ ││ ││ │└───┘└───┘└───┘└───┘└───┘└───┘└───┘┌───┐┌───┐┌───┐┌───┐┌───┐┌───┐┌───┐│ ││ ││ ││ ││...

There are 1000 people in a conference. 500 speak English, 500 speak Spanish and 500 speak Hindi. What can be the maximum number of people who speak only 1 language?