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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... Full description
Series: Sir Cumference math adventures (Math adventures)
Sir Cumference and the first round table (Volume 1.)
Sir Cumference and the dragon of pi: a math adventure (Volume 2.)
Sir Cumference and the Great Knight of Angleland: a math adventure (Volume 3.)
Sir Cumference and the sword in the cone (Volume 4.)
Sir Cumference and the Isle of Immeter: a math adventure (Volume 5.)
Sir Cumference and all the king's tens: a math adventure (Volume 6.)
Sir Cumference and the Viking's map: a math adventure (Volume 7.)
Sir Cumference and the off-the-charts dessert: a math adventure (Volume 8.)
Sir Cumference and the roundabout battle (Volume 9.)
Sir Cumference and the Fracton Faire (Volume 10.)
Sir Cumference and the 100 percent goose chase: percentages : a math adventure (Volume 11.)