Hi,

Rows are horizontal, columns are vertical.
For a 6 x 6 table, or to be more precise,
for the first 6 rows and the first 6 columns
in a uniform table,
whereby uniform means, all rows got the same number of cells,
all columns got the same number of cells.

Sub Test444()
Dim oTbl As Table ' 1st table in doc
Dim r As Long     ' row
Dim c As Long     ' column
Randomize
Set oTbl = ActiveDocument.Tables(1)
With oTbl
For r = 1 To 6
  For c = 1 To 5
     oTbl.Cell(r, c).Range.Text = CLng(55 * Rnd + 1)
  Next
  c = 6
  oTbl.Cell(r, c).Range.Text = CLng(42 * Rnd + 1)
Next
End With
End Sub

HTH