1
Read the shape
Name the visible trick before solving. Squares ending in 5 (3d, hard prefix).
Level 9 - foundation
6 visual blocks - recognize the shape
Name the visible trick before solving. Squares ending in 5 (3d, hard prefix).
Match the shortcut to the number shape.
Check for x11, near-base, x25, or x125.
Use an estimate to catch bad padding.
Use the quickest safe method.
One trick per problem; do not mix rules.
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