What number systems may have been used for Indus civilization weights?

The Indus civilization employed sophisticated weights and measures, though the exact nature of their number systems remains a subject of ongoing study.

Early analysis of chert cuboid weights suggested a combination of two systems:
* A binary system for lower denominations (1, 2, 4, 8, 16, 32, 64).
* A decimal system for larger weights (160, 200, 320, 640, 1,600, 3,200, 6,400, 8,000, and 12,800).12

However, more recent research incorporating additional findings from sites like Lothal suggests a different, more complex model. This newer interpretation proposes that both weight series were based on an underlying decimal principle, where each decimal number was further multiplied and divided by two. This results in ratios such as 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50, 100, 200, and 500.12

Because these findings are still being evaluated, scholars continue to investigate the full complexity of the Indus weight system.12