Joshua 15:32

all the cities are twenty and nine Thirty-six, however, are actually given, viz., (1) the first group= 9; (2) the second group= 5; (3) the third group= 9; (4) the fourth group13 =36 in all. The discrepancy has been variously explained by supposing (a) that some of the places were merely hamlets or villages, and were therefore not counted with the rest; (b) that in some cases two names may have belonged to the same city; (c) that there is an error in the numeral letters; (d) that the author originally wrote fewer names, and "that others were added by a later hand without a corresponding alteration being made in the number." (See Keil in loc.)