If a number is doubled everyday for 64 days equal to the 64 squares on a chessboard, will the number be in hundreds, thousands, millions or billions? Explore doubling numbers using your own DIY Abacus.
King's Chessboard by David Birch, illustrated by Devis GrebuA story set in ancient India. A wise man refuses a King's reward, when the King insists on a reward, the wise man asks for a grain of rice for each square on the King's chessboard, doubling the amount he receives each day. Will all the rice in the King's granary suffice? Subscribe to Toka Explorer Gift a Box
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