I think what they are trying to say is all the building materials and measuring tapes are designed with halves quarters, eighths, etc. in mind. But obviously that could have been done in metric too. But 2 and 5 are the only common factors in metric. 12 inches in a foot means 2 3 and 5. 5280 feet in a mile is similarly dividable. One of the reasons metric time never took of was because we have more factors in 60 and 24 than in 10.
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I think what they are trying to say is all the building materials and measuring tapes are designed with halves quarters, eighths, etc. in mind. But obviously that could have been done in metric too. But 2 and 5 are the only common factors in metric. 12 inches in a foot means 2 3 and 5. 5280 feet in a mile is similarly dividable. One of the reasons metric time never took of was because we have more factors in 60 and 24 than in 10.