A bicycle under the metal railing of the stairs belongs to the building’s manager, who has kept it for his own use primarily, and secondarily for lending to friends who stop by and live in the building for a while.

The building manager is a quiet man who keeps to himself, but occasionally amuses the building’s residents with arithmetical puzzles and logic problems, posted on a small board at the bottom of the stairs.

Word-chain puzzles:
HIM LOVE ONE
HER HAVE ORE
ALL HATE ALE

Anagrams:
STREET = TESTER
ATHENS = HASTEN
ABSOLUTE = OUSTABLE