How Many Beads are on an Abacus?
The answer to this question depends on the type of abacus you are considering. The Japanese version of the abacus, called a Soroban, has 5 beads per rod. Each rod of the Soroban can represent a digit from 0 to 9. Since a soroban is designed with a base-10 numbering system, the soroban is ideal