Analogy
An analogy is a pair of items in some relation, A : B, together with a third item C; the task is to find the item D that stands in the same relation to C: A : B :: C : D. The items can be words, numbers, letter groups or figures.
General Aptitude · topic
Deduction, induction, analogy and numerical reasoning
Deduction with conditionals, contrapositive, only if and unless; categorical statements and syllogisms checked with Venn diagrams; induction and counterexamples; analogy and coding rules; number puzzles, arrangements, blood relations, directions, clocks and calendars.
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Logic: Deduction and Induction
An argument gives premises and claims that a conclusion follows from them. Deduction claims that the conclusion follows necessarily: if the premises are true, the conclusion cannot be false.
Numerical Relations and Reasoning
Puzzles solved by combining small facts about order, position or number: seating, ages, directions, clocks and calendars, inequality chains and digit conditions, each with a disciplined representation and the arithmetic facts it relies on.
Deduction, induction, analogy and numerical reasoning cheat sheets
One-page visual sheets for this topic, in the sheet library on the store. Previews are free; the full sheets come with the subject pack.