Chronicle

The PASCAL ChronicleSMART PROBLEMA group of four people has to cross a bridge. It is dark, and they have to light thepath with a flashlight. No more than two people can cross the bridge simultaneously,and the group has only one flashlight. It takes different time for the peoplein the group to cross the bridge:Annie crosses the bridge in 1 minute,Bob crosses the bridge in 2 minutes,Catherine crosses the bridge in 5 minutes,Dorothy crosses the bridge in 10 minutes.How can the group cross the bridge in 17 minutes?ANSWERMove 1 Annie + Bob cross the bridge together time = 2 minutesMove 2 Bob goes back time = 4 minutesMove 3 Catherine + Dorothy cross the bridge together time = 14 minutesMove 4 Annie goes back time = 15 minutesMove 5 Annie + Bob cross the bridge together time = 17 minutesNicoletta Koursari 1C~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~A TRICKY PROBLEMIt was Christmas Day. In our house we organized a party to celebrate Christmas.There were 20 guests in our house. How many handshakes were exchangedbetween our guests?ANSWER190 handshakesAnna Stephanou 1C~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~KenKenKenKen is an arithmetic and logic puzzle invented in 2004. Theaim of each puzzle is to fill a grid with digits, so that no digit appearsmore than once in any row or column. KenKen grids aredivided into heavily outlined groups of cells –– often called―cages‖ –– and the numbers in the cells of each cage must producea certain ―target‖ number when combined using a specifiedmathematical operation (either addition, subtraction, multiplicationor division). Digits may be repeated within a cage, as long asthey are not in the same row or column.Let‘s see how good your arithmetic and logic is. Try to completethe following KenKen problem using the numbers 1 to 6.Once you tried check your answers:Natasa Antoniou 3C66