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Floor 75 only exists for one day per century.

Floor 76 is higher than any of the floors below it! Amazing!!!

floor 77 factors in real numbers

Floor 78 requires all visitors to have a catheter.

Floor 79 exists in practice, but not in theory.

Floor 80 theorises about practising.

Floor 81 is actually nine floor 9s arranged in a 3x3 grid.

Floor 82 canmot be found on any signs, maps or plans of the building. It contains secret listening equipment set up by a shadowy organisation to spy on those occupying the prime numbered floors.

The residents of floor 83 have long had a nagging suspicion that someone is listening in on them.

Floor 84 is miniaturized. It has special equipment to shrink and grow everything that enters and leaves the floor, except there's a slight flaw in the leaving device which causes things to be only 99% of its original size when regrowing. This is becoming a problem for those who regular visit.

Floor 85 derives the laws of the universe from many, many years of observation.

Floor 86 contains a seemingly-endless corridor with a long series of doors. At the end is a trap door which drops visitors on top of the lone person in floor 13.

Floor 87 is where all the dirty diapers are stored. It is also where kids a placed in timeout for punishment.

Conveniently floor 88 is the creche for kids whose parents work in other parts of the building. Opening hours are 4am - 10am because the manager has a weird sleep schedule and refuses to do anything else.

floor 89 contains many pianos and plays classical music

Floor 90 contains many banjos. It also plays classical music.

Floor 91 contains the solution to every Wordle.

floor 92 assumes the riemann hypothesis is true.

Floor 93 is from another dimension.

floor 94 receives an award for promoting peace.

Floor 95 contains a battle arena for babies.

Floor 96 knows what you did.

Floor 97 contains a single envelope. The envelope contains instructions. You have five minutes to read the instructions, then one hour to complete the task. During this time, you may not leave floor 97 for any reason. If you are successful, you may find a new task awaiting you on another floor. If you are not, you will not reach any further floors.

Floor 98 thinks floor 97 has been watching too much of the taskmaster.

floor 99 has many red balloons