Variable As Unknown practice with teacher guidance, common slips, and next-step routes.
This skill appears in Alphametic unused-digit entry, Symbolic digit-expression assignment, Compact equation blank entry, Symbol-substitution paired-panel choice, Symbolic-digit inequality greatest-numeral choice.
Alphametic unused-digit entry asks the player to solve the visible alphametic constraints and enter or select the one unused decimal digit.
Balanced growth
Compact equation blank entry asks the player to enter one integer in the sole already-active blank so the compact equation is true.
Balanced growth
Symbol-substitution paired-panel choice asks the player to infer one fixed, slot-preserving token-to-digit substitution from two unpaired collections of completed three-symbol strings, then choose the exact ordered code string for a target sequence.
Balanced growth
Symbolic digit-expression assignment asks the player to assign digits to symbols or build the required expression so every declared arithmetic, place-value, domain, and distinctness constraint is satisfied; submit the complete declared response object.
Balanced growth
Symbolic-digit inequality greatest-numeral choice asks the player to use the digit inequalities and distinctness rules to choose the greatest valid symbolic numeral.
Balanced growth
Fresh independent work can move toward Core, Transfer, or Challenge routes; help use or confusion keeps support visible.
Hints keep attention on the visible structure; reveals show the path without counting as independent evidence.
Presentation can reduce reading and interaction load without changing the selected skill. Practice focus can bias compatible work without breaking prerequisites or story fit.
