The diagonal of this 3 x 5 grid goes through 7 squares.
How many squares would the diagonal of a 12 x 20 grid go through?
What about a 6 x 9 grid?
Solution
In a 12 x 20 grid, the diagonal would go through 28 squares. In a 6 x 9 grid, the diagonal would go through 12 squares.
Can you generalise your answer for an n x m grid?
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