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Row 5: The Ridge

Row 5 · 2

The ridge

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You are following the Slow Read, which begins with the Prologue on Saturday 10 October and reads a chapter a week. Read ahead? Choose the last chapter you have finished. The site hides anything from a chapter you have not reached; this is proof of reading, never of buying, and a library copy counts.

A tally in rows of seven is a number already half written in base seven.

This part draws on Ch 16. It shows when your spoiler level reaches it.

Twenty-five rows of seven is three squares of forty-nine and four rows over, so a hundred and eighty-one is three forty-nines, four sevens and six: 346 in base seven.

346 in notch digits: rum khe, kas khi, nir.

In the ledger a full row of seven is closed by striking it through, and that strike is khi, seven. Look again at how the rows on the ridge are drawn.

Try it

  1. Write a hundred and eighty-one in base seven.
  2. Say 346 (base seven) in Somka.
  3. What is 1000 (base seven) in ordinary numbers?