1. Few numbers of persons are travelling together in a train, 6 persons can speak Marathi, 15 can speak Tamil and 6 can speak Hindi. In that group, none can speak any other language. If 2 persons in that group can speak two languages and one person can speak all the three languages, then how many persons are there in the group?




3. Between two books-ends in your study are displayed your five favourite puzzle books. If you decide o arrange the five books in every possible combination end moved just one book every minute, how long would it take?


4. Five boxes numbered 1, 2, 3, 4 and 5 are stacked on top of the other starting with number 1 at the top. Box 5 is removed and placed on the top of the stack. If the procedure is repeated three more times, which box will be at the bottom of the stack?












10. In a chess tournament each of six players will play with all other players exactly once. How many matches will be played during the tournament?


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