# Indian Mathematics: Ramanujan’s Taxi-cab Number

I remember once going to see him [Ramanujan] when he was lying ill at Putney. I had ridden in taxi-cab No. 1729, and remarked that the number seemed to be rather a dull one, and that I hoped it was not an unfavourable omen. “No,” he replied, “it is a very interesting number; it is the smallest number expressible as the sum of two [positive] cubes in two different ways.”
– G H Hardy

## Indian Mathematics: How To Find The Value Of Any Irrational Number?

A unique technique found in Bhakshali manuscript to find the value of irrational numbers of the form SquareRoot (n).

## The Magic Of 1089

Take a 3 digit number. Let’s say: 375. Reverse it. The reverse of 375 is 573. Find the difference (Larger number – Smaller number). 573…

## Indian Mathematics: How To Write A Magic Square?

A magic square is a square of numbers where each row, column, and diagonal gives the same sum. A n x n magic square has…

## Divisibility Test of 3: How It Works?

We need to see if a large number is divisible by 3. What do we do? Long division is one way. But we can simplify…