Sir Cumference and the Viking's map a math adventure

"Xaxon Yellowbearyd was the fiercest Viking warrior of his time. Now a map to his hidden treasure lies in the hands of Radius and Per. Together the cousins must decode the strange numbered grid on the map--and figure out the secret of the Viking's X and Y axes. As bandits pursue them, Radius and Per...

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Bibliographic Details
Main Author: Neuschwander, Cindy
Other Authors: Geehan, Wayne (Illustrator)
Format: Books Print Book
Language:English
Published: Watertown, MA : Charlesbridge, c2012.
Series:Charlesbridge math adventures.
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Summary:"Xaxon Yellowbearyd was the fiercest Viking warrior of his time. Now a map to his hidden treasure lies in the hands of Radius and Per. Together the cousins must decode the strange numbered grid on the map--and figure out the secret of the Viking's X and Y axes. As bandits pursue them, Radius and Per track down clues and use coordinate geometry in their quest for "treasure of the greatest measure"."--Dust jacket flap.
Physical Description:32 pages : color illustrations ; 25 cm.
ISBN:9781570917912 (reinforced for library use)
1570917914 (reinforced for library use)
9781570917929 (softcover)
1570917922 (softcover)
Author Notes:Cindy Neuschwander is an elementary school teacher who loves teaching math. She also enjoys traveling, reading, and writing stories. She thought up Sir Cumference while visiting medieval castles in England. Cindy lives in Pleasanton, California.