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Young World
Happy ■ day!
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March 14 was ■ day. How did it happen?
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Confused? ■ (pi) is one of the most important numbers in mathematics. It is the ratio between the circumference (C) and diameter (d) of any circle.C/d = ■ = 3.14159 26535 89793 23846 26433 83279 50288…. the digits of ■ go on forever and have no pattern!
Whenever you use ■, you have to use an approximation. Often we use 3.14. March 14, is written as 3/14 in the U.S. date format. So March 14 is ■-day!
If you want to be more accurate you could celebrate ■ -minute, that’s March 14 at 1:59. What about ■ -second?
In 2006 a Chinese man called Akira Haraguchi recited the first lakh digits of ■from memory without error! It took him 16 hours. How did he do it?
He memorised stories. How could this sentence help you to remember the first nine digits of ■?
How I wish I could recollect pi easily today! *
Why don’t you write a longer sentence of your own to help you remember more digits.
To learn more about ■ and the amazing world of mathematics visit www.heymath.com
*(Clue: count the number of letters in each word)
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