Author:
Mills, Claudia.
Edition Statement:First edition.
Imprint:New York : Farrar Straus Giroux, 2014.
Description122 pages : illustrations ; 20 cm.
Note:"Margaret Ferguson Books."
Note:Annika hopes to change her best friends' hatred of math by winning a Sudoku contest, but she does not realize how important their lack of mathematical ability is until they make a mistake at the school carnival.