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Parent volunteers Theresa Curran, left, and Ann Sanders, behind, look on as Kennebunk High School math teacher Alan Carp explains the combinatorials puzzle “6 Choose 3” to fifth graders Karissa Simpson and Fayth Nedeau of Mildred L. Day School. The Julia Robinson Math Festival took place Thursday, May 23 at University of New England in Biddeford. (Alex Acquisto photo) 3p2.jpg