Puzzle of The Week

When 27 cubes are assembled, one of the cubes fills the center, leaving 26 cubes visible on the outside. How many "corner" cubes are there (with 3 sides visible), how many are "edge" cubes (with 2 sides visible) and how many are "center" cubes (with 1 side visible)?


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Pankaj jha is the founder of makeageek.com. He did his schooling in London at Claremont high school where he did his A levels. He has two master's from Marquette university in Wisconsin and Columbia university in New York where he was also a PhD.(ABD) candidate in Applied mathematics. Subsequently, he went to work in Wall Street for top investment banks like Lehman Brother, Citigroup and JP Morgan and RBS at the Director and Managing Director Level in Quantitative Finance.. After living in the US for 22 years he returned to India in 2012. Having young children of his own he is passionate about helping kids achieve the very best.


Dr. Aniruddha Weling

B Tech. IIT Madras

PhD. Columbia University

Dr. Vikas V. Gupta

B Tech. IIT Mumbai

PhD. Columbia University

Dr. Charanjit S. Jutla

B Tech. IIT Kanpur

PhD. University of Texas at Austin