The objective in this type of puzzle is to work out the factors in the top
row and left hand column.
The increment buttons (spinners) in each of these spaces, allow experimentation
and feedback.
Click here to get the Excel file Make a Copy
In Make a Copy 2 less information is provided. Can this puzzle be solved?
Extend your thinking with some investigative activity:
What is the minimum number of values that must be provided if the puzzle is
to have a unique solution?
Does the position of these values matter?
Are the answers to these questions different when any of the given values have
more than two prime factors?
14 can be expressed as a product of only two prime factors: 2 x 7
12 has prime factors: 2 x 2 x 3
Make up similar puzzles with different size, or different shape, grids.
Try more interesting functions than simple multiplication.
This sheet uses several construction techniques worth knowing: