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How to extract the 13th root of a 100-digit number in less than twelve seconds |
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Written by Mohammad Reza Moallem
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Friday, 31 October 2008 |
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You may have heard the recent news of Dr. Gert Mittring, who correctly extracted the 13th root of a 100-digit number in less than 12 seconds...in his head. This article shows you how to accomplish the same feat in the same amount of time using an ordinary calculator.
This math article was inspired by the news article posted by our site administrator, Clay, who was kind enough to encourage me to resubmit my post as this present article for the interest of our readers.
The posted article reported how Dr. Gert Mittring, who has mastered mental calculations to a unimaginable level, managed to give the correct answer to extracting the 13th root of a 100 digit number in front of an audience and 2 umpires who selected the number at random. It was also reported that: "Spectators using electronic calculators were left minutes behind. "
If you read on, you will find out how you could outperform the spectators, calculator in hand! Just imagine the time it takes to input a 100 digit number is already more than 12 seconds!
If we were to be requested to count the number of grains of sand at a beach, most of us would stare on the white sand and say, how would I know. This is perfectly normal. For those of us who believe that it is possible, we will TRY and develop a method. Perhaps not the exact number, perhaps not even nearly exact, but it will be an approximation. From the approximation, we refine our method, and get even closer. This is how geniuses like Dr. Mittring work. |
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Afghan Shiites Embrace New Acceptance |
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Written by Mohammad Reza Moallem
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Wednesday, 07 January 2009 |
Washington Post Foreign Service
Sunday, January 4, 2009; Page A12 KABUL, Jan. 3 -- For the past week, caravans of cars have raced triumphantly around the Afghan capital, trailing huge green and red banners. Overpasses are draped with black cloth, and loudspeakers blare hypnotic religious chants punctuated with the slow rhythm of clanking chains. |
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Written by Mohammad Reza Moallem
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Thursday, 09 October 2008 |
  Reference: The New York Times |
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Our man in Kabul says US strategy is failing |
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Written by Mohammad Reza Moallem
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Thursday, 02 October 2008 |
- Julian Borger, diplomatic editor and Simon Tisdall in Washington
- The Guardian,
- Thursday October 2 2008
Britain's ambassador to Afghanistan believes the US strategy there is failing, Nato reinforcements would be counter-productive and that it would be better if "an acceptable dictator" came to power in Kabul in the next few years, a French satirical weekly reported yesterday.
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Written by Mohammad Reza Moallem
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Sunday, 14 September 2008 |
Introduction
Probability is the likelihood or chance of an event occurring.
Probability = the number of ways of achieving success
the total number of possible outcomes
For example, the probability of flipping a coin and it being heads is ½, because there is 1 way of getting a head and the total number of possible outcomes is 2 (a head or tail). We write P(heads) = ½ .
The probability of something which is certain to happen is 1.
The probability of something which is impossible to happen is 0.
The probability of something not happening is 1 minus the probability that it will happen. |
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