Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solv...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Part of the popular Sir Cumference series! Baker Pia is back with a handy way of counting by tens...

Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solv...

Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solv...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Part of the popular Sir Cumference series! Baker Pia is back with a handy way of counting by tens...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

A funny and pun-filled retelling of 'The Sword and Stone' that introduces readers to mathematical...

For fans of the Sir Cumference series with coordinate geometry on their mind, here is the seventh...

Join Sir Cumference and the gang for more wordplay, puns, and problem solving in the clever math ...

For fans of the Sir Cumference series with Pi on their mind, here is the second installment in th...

Medieval math favorite Sir Cumference series is back! Lady Di of Ameter and Percilla Centwell fig...

Medieval math favorite Sir Cumference series is back! Lady Di of Ameter and Percilla Centwell fig...

'Sir Cumference and Lady Di learn a method to calculate the volume of grain needed to feed everyo...

'Sir Cumference and Lady Di learn a method to calculate the volume of grain needed to feed everyo...