6 × 9 in base 13
42₁₃
Calculated
The arithmetic joke that 6 × 9 = 42 in base 13
ArtThe Book of 42Scribe art
6 × 9 = 54₁₀ = 4×13 + 2 = 42 in base 13. The arithmetic holds. Adams denied it as his origin. A frame, not a transit.
What it supports
A true change-of-base identity, later attached to Hitchhiker as fan mathematics.
What it does not
The identity holds. Adams denied it as origin. The author stays the author.
Calculation
6×9 = 54; 54 = 4×13 + 2 → 42₁₃
Positional notation, base 13
ExactnessDerived mathematics
Form42
Unitbase-13
Strengthhard