Happy Pi Day 2013

It’s March 14 (3.14) and its Pi Day.

Pi Day is an annual celebration of \pi the most popular mathematical constant. Larry Shaw of San Francisco Exploratorium led the first large celebration of Pi Day in 1988, and since then it has spread all  over the world.

Pi Pie (via Wikipedia)

To know more about \pi, you might want to read my posts about it.

The Solution to the Matchstick and Square Puzzle

It’s been three months since I posted the Matchstick and Square puzzle. According to one of the comments, it’s already causing household arguments., so I think it’s high time that I post my solution. There is no key to the puzzle, I only found it on a Facebook Page.

matchstick puzzle solution

Please check if my solution below is correct. 🙂

Solution

There are nine  1 \times 1 squares.

There are five 2 \times 2 squares.

There is one 3 \times 3 square.

There is one 4 \times 4 square.

Therefore, there 16 squares.

13 Calculus Tutorial Sites, 22 000+ Solved Problems

If you want to learn Calculus, the websites below will most likely help to you. Most of these websites contain conceptual and intuitive explanations of Calculus concepts and most of them are interactive.

calculus-ALGEBRA-MATH-RELATED-WORDS-olga, olga shulman lednichenko, lednichenko, lednichenko-olga, olgalednichenko, lednichenko-olya, olya lednichenko, IMGAES AND PHOTOS OLGA LEDNICHENKO

All in all, they contain more than 22,000 calculus tutorials and computations.  » Read more

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