Part 1: Diagonally upward
The strategies:
1.Start from the top row middle. Start From the smallest to the largest number or largest number to the smaller number.
2.Continue move diagonally upward.
e.g. Step 5 and 6
3.Special case for diagonally upward: number on the side, not including the top row
e.g. Step 3 and 8
More strategies>>>
Next post>Part 2: Top Row, how to solve?. Click to Hyperlink.
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