BRAIN DIFFICULT RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

He started his journey at the north pole he would end at where he started. At the north pole here is no east or west only south. Once he walks a mile south he would have east and west as well as north and south. Granted north would only consist of 1 mile. Walking a mile north would put him back at the north pole which is a single point. Did you answer this riddle correctly?
YES  NO  

Only one time. After that, you would be subtracting from 20. Did you answer this riddle correctly?
YES  NO  

They ordered three cups, one for each person. The grandmother is also a mother and the mother is also a daughter.

Another solution: They ordered two cups. Both are mothers and daughters and one is a grandmother. Did you answer this riddle correctly?
YES  NO  

You earned $500 $100 = $400. Did you answer this riddle correctly?
YES  NO  

The first ship!

First ship = d/35 + d/35 = 2d/35 = 0.0571d

Second ship = d/30 = d/40 = 70d/1200 = 0.058 Did you answer this riddle correctly?
YES  NO  

Brain Did you answer this riddle correctly?
YES  NO  

A Neurosturgeon Did you answer this riddle correctly?
YES  NO  

Frank-Einstein! Did you answer this riddle correctly?
YES  NO  

Because the keys are inside! Did you answer this riddle correctly?
YES  NO  

A towel. Did you answer this riddle correctly?
YES  NO  

The human brain. Did you answer this riddle correctly?
YES  NO  

An onion. Did you answer this riddle correctly?
YES  NO  

A wave. Did you answer this riddle correctly?
YES  NO  

A sun-burned zebra! Did you answer this riddle correctly?
YES  NO  

A cold Did you answer this riddle correctly?
YES  NO