Topic: calculation list of topics
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10 items are filed under this topic.

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	777777 times 111111		2010-07-07
		From Chew: What is 777777 times 111111 without using a calculator? Answered by Chris Fisher.
	Figure out the square root of something		2009-12-20
		From eric: is there an ez equation to figure out the square root of something? Answered by Harley Weston.
	Acreage calculation		2009-10-29
		From Angela: I am appraising a small portion of property for a right of way for a new sewer line. I have appraised many similar projects in the past; however the engineer always calculated the exact acreage and/or dimensions of the parcel being taken. My survey states the following: "141 linear ft. of 25' permanent R/W. I divided the linear feet x 12 and mult. by 25 to get the square footage, but it just doesn't seem right. Any suggestions? Am I missing something? Answered by Robert Dawson.
	(570 divided by 15) multiplied by (5 plus 26)		2009-06-24
		From Sherrie: What is the answer to this math question: (570 divided by 15) multiplied by (5 plus 26).......... Thank you, Sherrie:-) Answered by Penny Nom.
	36cm to the second power divide 10cm		2009-02-26
		From val: 36cm to the second power divide 10cn Answered by Penny Nom.
	How accurate is the following calculation?		2008-09-03
		From Craig: Given that these numbers are only accurate to 2 decimal places, how accurate is the following calculation? 1.73 - 2.16 + 0.08 + 1.00 - 2.23 - 0.97 + 3.02 = 0.47 How do I work out the accuracy? Answered by Penny Nom.
	A one pass calculation of standard deviation		2007-03-19
		From Murtaza: Hi I searched the listings but couldn't find what i am looking for. I have a dataset and i am allowed only 1 pass through it. At the end of this pass i must have the mean and standard deviation. Calculating the mean is easy as also demonstrated in your listings. I think the same can be done for standard deviation as well. But the doubt that i have is this :- Will the calculated standard deviation be sequence dependent ? i.e. if i change the order in which the data items enter the system, will the std deviation also change ?? Thanks in advance Murtaza Answered by Penny Nom.
	Calculations		2002-12-15
		From Mahdi: This problem is rather general, but it usually makes a lot of problems. I almost have no difficulty in math and physics questions, but unfortunately I'm not at all accurate in simple one or two digit calculation. I even sometimes make silly mistakes in simple sums like 7+4=12 or 4+5=11! Is there any effective way to reduce these mistakes? Answered by Walter Whiteley.
	A calculation with 6 numbers		2001-06-16
		From Edwin: I'm asked to come with, and program (in Ansi -C) an algorithm that calculates all the possible results of a calculation with 6 numbers and one result. For example: I want all calculations with the numbers 3, 3, 8, 8, 2, 9, and with a result of 786. all numbers may be used once, arithmetical operations allowed are + - / *, fractions are not allowed. The problem here is what is a fast method to do this (i.e. what's algorithm that can to this). Answered by Claude Tardif.
	Human Calculator		1998-09-14
		From Pam Sloan: I recently saw a special on NBC Dateline about a man known as the human calculator. They called him Mr. Math. I want to know more about his books, seminars, and activities. Also, what is his real name? Answered by Patrick Maidorn.

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