eli5 why is 9 the last number? and why then we use 10 and repeat in sets of 10? Submitted by anujshr7 t3_z07mpo on November 20, 2022 at 3:58 PM in explainlikeimfive 39 comments 0
MechaBeatsInTrash t1_ix406s2 wrote on November 20, 2022 at 4:14 PM 1, 2, 3, 4, 5, 6, 10? 11, 12, 13, 14, 15, 16, 20? Are you asking why we don't use base 7 or why we use base 10? Different number systems have been used through the years for different purposes, see binary and hexadecimal. 10 is just the easiest and most universal. Permalink 4
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