Logic
41 reasoning problems in this domain. Each starts from a depth archetype and bridges toward a competition type.
Deduce digits and place values from clues Pin Down a Number from Digit and Range Conditions
Solve a cryptarithm for each letter Recover Hidden Digits from Carries
Find fractions meeting conditions Pin Down a Number from Digit and Range Conditions
Complete a magic square Solve a Table or Graph Step by Step from Clues
Find the value each shape stands for Solve a Table or Graph Step by Step from Clues
Work backwards from the result Work Backwards to Recover a Start Value
Find an object's weight from balance Division as the Inverse of Multiplication
Deduce weights from several balances Find Two Unknowns from Sum and Difference
Find the unknown by working backwards Work Backwards to Recover a Start Value
Set up the correct add/subtract equation Track a Quantity Through Changes
Find weights from mobile balance Solve a Table or Graph Step by Step from Clues
Find the counterfeit coin by weighing Solve a Table or Graph Step by Step from Clues
Order objects by weight from comparisons Solve a Table or Graph Step by Step from Clues
Solve a table from given clues Solve a Table or Graph Step by Step from Clues
Logic grid deduction table Solve a Table or Graph Step by Step from Clues
Draw a table to solve Solve a Table or Graph Step by Step from Clues
Measure a target with unmarked jugs Work Backwards to Recover a Start Value
Build a table to enumerate cases Solve a Table or Graph Step by Step from Clues
Sort objects by a given criterion classify-objects-by-attribute
Classify by two criteria with a Venn diagram classify-objects-by-attribute
Infer the hidden sorting rule infer-classification-rule
Logic grid deduction table Solve a Table or Graph Step by Step from Clues
Fill a table from conditions Solve a Table or Graph Step by Step from Clues
Chain attribute cards by one-attribute change attribute-chain-one-difference
Combine mixed data to complete a graph Solve a Table or Graph Step by Step from Clues
Common and different attributes of two groups attribute-common-difference
Judge claims from a line graph Read and Scale a Data Graph
Recover hidden digits in a vertical sum Recover Hidden Digits from Carries
Find numbers meeting digit clues Pin Down a Number from Digit and Range Conditions
Cryptarithm digit deduction Recover Hidden Digits from Carries
Cryptarithm: Letters Stand for Digits Recover Hidden Digits from Carries
Deduce the hidden flipped cards Pin Down a Number from Digit and Range Conditions
Recover Erased Multiplication Digits Recover Hidden Digits from Carries
Capstone: grid-sum and remainder conditions Divisibility and Remainder Reasoning
Find a number from division clues Divisibility and Remainder Reasoning
Smallest number meeting remainder bounds Divisibility and Remainder Reasoning
Side length of a square from fitted figures Tile and Cut Figures with Congruent Pieces
Insert plus and minus to make an equation Pin Down a Number from Digit and Range Conditions
Multiplication cryptarithm Recover Hidden Digits from Carries
Multiplication synthesis challenge Recover Hidden Digits from Carries
Find unknowns satisfying multiple conditions Pin Down a Number from Digit and Range Conditions