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## Natural Geometry of Natural Numbers

How does this sound? The numbers 18 and 30 together looks like a chair.  The Natural Geometry of Natural Numbers is something that is never advertised, rarely talked about. Just feel how they feel! Let’s revise some ideas and concepts to understand the...

## Really understanding Barycentric coordinates

Sometimes we are interested in the relative position of a point with respect to a triangle. Is it close to the vertices? Is it closer to one of the sides compared to the other sides? This brings home the notion of mass point coordinates or barycentric coordinates....

## Problem Solving Marathon Week 2

We are having a full fledged Problem Solving Marathon. We are receiving wonderful responses from the end of our students which is making the session more and more alluring day by day. Here we are providing the problems and hints of “Problem Solving...

## Cheenta @ This Week

March 18 to 24 January brings great news! Sambuddha got an offer from Cambridge. Aditya got multiple offers including one from Oxford. Soumyadeep cracked the TIFR entrance! We feel ecstatic. The entire credit goes to the students. We feel awesome to be a part of their...

## INMO 2019 Discussion

Indian National Mathematical Olympiad is organized by Homi Bhabha Centre for Science Education. This post is dedicated for INMO 2019 Discussion. You can post your ideas here. Problem 1. Let $$ABC$$ be a triangle with $$\angle BAC > 90^\circ$$. Let $$D$$ be a point on...

## Test of Mathematics Solution Objective 401 – Trigonometric Series

This is a Test of Mathematics Solution (from ISI Entrance). The book, Test of Mathematics at 10+2 Level is Published by East West Press. This problem book is indispensable for the preparation of I.S.I. B.Stat and B.Math Entrance. Also see: Cheenta I.S.I. & C.M.I....