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Algebra · SS1–SS2

Logic

Statements, their truth values and how “and”, “or”, “not” and “if … then” combine them.

Before this
Sets & Venn diagrams
Leads to
Sets & logic

Learn

  1. 1Statements and implicationsStatements and their truth values, the symbols ∼, ∧, ∨, ⇒ and ⇔ with their truth tables, and which of the converse, inverse and contrapositive of p ⇒ q is a valid conclusion.Done14 min
  2. 2Venn diagrams and valid conclusionsDrawing 'all', 'no', 'some' and 'only' statements as Venn diagrams, chaining two statements into nested sets, and using the diagram to decide whether a conclusion is valid.Done14 min

Practise

Answer logic questions one at a time. You'll know straight away whether you're right, with hints and the working step by step.

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Past questions (12)

From 2018–2024: 8 WAEC, 4 NECO. Theory questions first, then objective, newest first.

Theory (3)

Objective (9)