AMO Grade 4 · 12. Logical reasoning
Solve logic puzzles by drawing: elimination tables and order lines, two-way tables and number grids, match diagrams, tables of cases for truth-and-lie puzzles, least/greatest values with the worst case, and grids with equal sums.
Organise clues in an elimination table or on an order line.
Fill two-way tables, Latin-square grids and match diagrams step by step.
Solve truth-and-lie puzzles by testing every case.
Find least and greatest values, including worst-case guarantees, and prove them with an example.
Use line sums to find shared cells and magic-square sums.