## Pages

### Merry Christmas and Happy New Year

New Year Puzzle: In a magic square, the sum of numbers on each row, each column, and each diagonal is the same. Fill in the numbers in the following squares to make them become magic squares.

### Which is smaller? which is larger?

Today let us look at the following two tricky questions:

Question 1: Among these two numbers 4444 x 55555 and 5555 x 44444, which one is smaller? which one is larger?

Question 2: How about  5000 x 5000 and 4999 x 5001, which one is smaller? which one is larger?

### Vianney's awesome square!

The reasons that this square is so awesomistic are:
• each entry is a square number: $$1=1^2, \quad25=5^2, \quad 49=7^2$$
• the sum of numbers on each row, each column, and each diagonal is the same.

On this $\pi$ day occasion, we will learn about the concept of radian.

### Pythagorean Identity

This year we will start a blog series about mathematical identities. Let us begin today with the Pythagorean Identity $$a^2 + b^2 = c^2$$