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MCI Special Events

The activity consists of guided problem-solving in a fun setting, with lots of discussion, collaboration, and exchange of ideas.
Current and upcoming Events
How many digits does the repeating decimal expansion of 1/1729 have?
Apoorva Khare (IISc Bengaluru)
Interactive session: 08 May 2025, 18:00
Online via Zoom

Abstract:

We all know that 1/3 = 0.3333… and 1/(3x3) = 0.1111… have the same number of digits - one - in their recurring parts. (Is 3 the only prime with this property in base-10?) More generally, one can ask how many digits 1/d has in its recurr...more

Past Events
MathSpark 2024
Kaushik Basu (University of California, Berkeley)
Interactive session: 21 December 2024, 10:00
Foyer area of Chandrasekhar Auditorium, ICTS

Event Description: Tales of pyramids and spheres: speaking volumes of Cavalieri

Abstract: We will explore the computation of volume of interesting solids using simple geometrical ideas and dimensional arguments. We will start with th...more

MCI Special talk: Divisibility tests and recurring decimals
Apoorva Khare (Indian Institute of Science, Bengaluru)
Interactive session: 17 November 2023, 18:00
Online Zoom and YouTube live stream

Abstract:

If we had two extra thumbs, how would we check if "2024" is divisible by eleven? Or by "11"? We will see a simple test in any base B, i.e. usable by species having any number of fingers (whether shaped like hot dogs or not); an...more

MathSpark
Kaushik Basu, Joseph Samuel
Interactive session: 22 July 2023, 10:00
Foyer area of Chandrasekhar Auditorium, ICTS

Event Description: The activity consists of guided problem-solving in a fun setting, with lots of discussion, collaboration, and exchange of ideas.

About the Speaker: Koushik Basu an instructor in Math and Physics at the graduat...more