Ternary numeral system

The ternary numeral system is a way of counting, used by some cultures, that is based on the number 3 instead of the number 10. Instead of counting in tens like we do in the decimal (base 10) system (1, 10, 20, 100, 1000), in the ternary system, you count in threes (1, 3, 9, 27, 81). So, when counting in the ternary system, each group of three number symbols stands for a bigger number. It's like building blocks, with each group of three blocks representing a bigger block.