Each problem gives comparisons between people or things. Arrange them in order; the third statement is true if the order forces it, false if the order contradicts it, and uncertain otherwise.
1Method
Rewrite every statement in one direction (for example, 'taller than')
Join statements that share an item into a chain: A > B and B > C give A > B > C
If two items are only compared with a third item, their own order is uncertain