If… then

Conditional reasoning with lamps.

How it works

Read the rules and decide: is the lamp on, off, or impossible to know?

• 30 progressive levels, from basic to advanced
• Levels 1 to 3 free, no card

More exercises in Logic

• Figure sequences
• Progressive matrices
• Geometric analogies
• Clue puzzle
• Truth-tellers and liars
• Logical elimination
• Venn diagrams
• Truth tables
• Alternating sequences
• Family tree
• Logical ordering
• Consistency
• Cause and effect
• Rule maze