1
Read the shape
Name the visible trick before solving. Near-100 square (above).
Level 14 - build-up
6 visual blocks - recognize the shape
Name the visible trick before solving. Near-100 square (above).
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.
We use cookies for analytics to improve your experience. Essential cookies for authentication are always active. Privacy Policy