To generate math questions on specific topics, skill sets, and difficulty levels.

This module generates questions to practice vertical multiplication. The generated questions focus on error-prone cases, including:

• Involvement of carry-over.
• Involvement of double carry-over (where the carry-over contributes to the carry-over of the next higher position).
• Presence of zero(s) in the middle position.
• Presence of zero(s) at the end position.