# magic square

## Magic Squares Using Semi-Primes

Wikipedia [1] defines a semi-prime as a natural number that is the product of two prime numbers. The definition allows the two primes in the product to be equal to each other, so the semi-primes include the squares of prime numbers. Displayed below are the first forty semi-primes.

## An Astonishing Property of 3rd Order Magic Square

In an article written in the February 1999 issue of the American Mathematical Monthly, titled appropriately “Magic Squares Indeed!”, the authors point out a truly remarkable property of this magic square; namely:
8162 + 3572 + 4922 = 6182 + 7532 + 2942,

## Remembering Ramanujan: An Interview

Prof B Sury, an algebraic number theorist working at Indian Statistical Institute, Bengaluru comments on his observations of Ramanujan's life and works. He also invites you to a quick take on contemporary (Indian) mathematical history and how Ramanujan's work inspired the subsequent trailblazers.

The second half of the video has a more serious discussion on Ramanujan's impact on themes that are at college level.

This is Math Nomad's first video.

## Ramanujan and National Mathematics Day

India celebrates Srinivasa Ramanujan's birthday (22 December) as National Mathematics Day. Teachers of India salutes the genius and shares the following tributes. A magic square for your math activity, a book review to add more depth in knowing more about his genius & a documentary that captures the tragic tale of losing such a giant talent at an unforgivable age of just 32.

## A magic square in Ramanujan’s Honour

In recent months, a Power-Point presentation file on a fourth-order magic square has been doing the rounds on the internet. It is titled “Ramanujan’s magic square” and it is written in a rather dramatic style. We give the gist of its content below, and then we ask you to account for the observed properties of the square using the theorems about fourth-order magic squares established elsewhere in this issue.

## Theorems on Magic Squares

Magic squares have been a source of recreation and leisure from ancient times. There is something about the symmetry and patterns contained in such squares that carry great appeal. In this piece, we shall prove two simple results about 3 × 3 and 4 × 4 magic squares.

And also,

## Prime Magic Squares

Magic squares have been a subject of fascination for centuries. Probably it is the elegance and the simplicity in the subject that attract people. Here we explore the question of how to construct magic squares composed solely of prime numbers.

## 64 Squares

Use a chess board to learn Math!

Getting even on a chess board : See how odd numbers & even number pattern show up on a chess board.

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