Located in the Okadaya More shopping centre in Japan's Kawasaki-Shi region, the tiny escalator - known as the Petit Calator - is just 83.4cm/2.8ft high, has only five steps and provides a ride ...

#Puzzle 139.1 #139.1A: Professor Pandit walks up a small escalator ... now is 5 times his previous downward speed, but he still maintains the discipline of travelling only one step at a time.

A version of this puzzle originally appeared in the May 1959 issue of Scientific American. We’d love to hear from you! E-mail ...

This would mean that the ridiculously small escalator will take around 5 seconds to take you from one end to the other ... Victoria Place shopping mall from the station is only around 10 steps in ...