1
Read the shape
Name the visible trick before solving. Sub via add (3d near-round).
Level 26 - mastery
6 visual blocks - recognize the shape
Name the visible trick before solving. Sub via add (3d near-round).
Match the shortcut to the number shape.
Check for x11, near-base, x25, or x125.
Use an estimate to catch bad padding.
Beat the clock with checked answers.
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