Around 90 per cent of people are fooled by this physical illusion. It tricks the mind into thinking that three objects together are lighter than one on its own
Source:
https://www.newscientist.com/article/2203422-weird-physical-illusion-makes-you-think-objects-are-impossibly-light/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home