12 Lines on the Underground
14 Lines in the London Underground System
seven spikes on the statue of liberties head
50 is L in Roman Numerals
12 seconds on the buzzer
Fifth-Generation Language
No Limit in Time
17 yak liquorish
This is a Ditloid. The answer is 12 sides on a dodecagon.
12 Semitones In An Octave12 Sides (edges) In An Octahedron
1 Wheel on a Unicycle
3 Way Light Bulb
284 Tube Stations in London