Next to the exercises there are reminders in the workbook. These are short recapitulations of the material from the manual for the students.
There are 9 reminders.
On the remaining 46 pages there are always 12 diagrams.That means a total number of 46x12-26 ( the drawings) = 526 positions.
The issues of the exercises correspond to those in the manual. See Manual for chess trainers.