A FAMILY LIVES IN A LARGE TOWER APPARTMENT BUILDING 10 FLOORS HIGH EVERY DAY THEIR SON TAKES THE ELEVAT RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

One of the 'fathers' is also a grandfather. Therefore the other father is both a son and a father to the grandson.

In other words, the one father is both a son and a father. Did you answer this riddle correctly?
YES  NO  

Water. Did you answer this riddle correctly?
YES  NO  

Mary. Did you answer this riddle correctly?
YES  NO  

22 times: 12:00:00, 1:05:27, 2:10:55, 3:16:22, 4:21:49, 5:27:16, 6:32:44, 7:38:11, 8:43:38, 9:49:05, 10:54:33. Each twice a day. Did you answer this riddle correctly?
YES  NO  

50 pounds.

In the beginning it is 99 pounds water and 1 pound other stuff. At the end the 1 pound other stuff is 2 percent so the total weight is 50 pounds. 50 pounds - 1 pound other stuff = 49 pounds water. So 99 pounds - 49 pounds = 50 pounds water lost. Did you answer this riddle correctly?
YES  NO  

Nep-tunes! Did you answer this riddle correctly?
YES  NO  

"I'm bacon!" Did you answer this riddle correctly?
YES  NO  

All of them. Did you answer this riddle correctly?
YES  NO  

Any, Houses can't jump Did you answer this riddle correctly?
YES  NO  

An antique! Did you answer this riddle correctly?
YES  NO  

Mice cream! Did you answer this riddle correctly?
YES  NO  

A frogs- it croaks all the time! Did you answer this riddle correctly?
YES  NO  

The President. Did you answer this riddle correctly?
YES  NO  

Christmas Did you answer this riddle correctly?
YES  NO  

50 Did you answer this riddle correctly?
YES  NO