Ordering and ranking from clues

Clues like A is taller than B but shorter than C pin down an order. Drawing a single line and placing people on it as clues arrive keeps the relationships visible, and shows clearly when the order is still not fully determined.

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Work through it

LearnWhat it is, how to spot it, a worked example, and where it goes wrong.
Practice — 3-point ladderNo problems written at this tier yet.Nothing written at this tier yet
Practice — 4-point ladder1 problem. Three in a row finishes it.0/3 in a row · 0/1 solved
Practice — 5-point ladder1 problem. Three in a row finishes it.0/3 in a row · 0/1 solved
Skill quizFinish every ladder that has problems first.Finish the ladders above first

Before and after

Needs first

CFT-02Draw the diagram LOG-03Elimination grids

Opens up

LOG-10Weighing and balance puzzles

In official papers

No indexed official paper question has been tagged with LOG-04 yet. The index grows one paper at a time, and it records only question numbers, point values and our own skill tags — never the problems themselves.

See the papers indexed so far

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